JPH02188589A - Production of tri-lower alkanoyloxyboron - Google Patents

Production of tri-lower alkanoyloxyboron

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Publication number
JPH02188589A
JPH02188589A JP923489A JP923489A JPH02188589A JP H02188589 A JPH02188589 A JP H02188589A JP 923489 A JP923489 A JP 923489A JP 923489 A JP923489 A JP 923489A JP H02188589 A JPH02188589 A JP H02188589A
Authority
JP
Japan
Prior art keywords
anhydride
acid
lower alkanoic
compound
reaction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP923489A
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Japanese (ja)
Other versions
JP2731853B2 (en
Inventor
Kengo Kawasaki
川崎 賢悟
Nobuhisa Fujita
展久 藤田
Hirobumi Kono
河野 博文
Takayuki Ikeda
池田 隆行
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Otsuka Pharmaceutical Co Ltd
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Otsuka Pharmaceutical Co Ltd
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Filing date
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Priority to JP923489A priority Critical patent/JP2731853B2/en
Publication of JPH02188589A publication Critical patent/JPH02188589A/en
Application granted granted Critical
Publication of JP2731853B2 publication Critical patent/JP2731853B2/en
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Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To obtain the title compound useful as a reagent in production of benzoheterocyclic compound useful as an intermediate for synthesizing antimicrobial agents by reacting boric anhydride with a lower alkanoic acid anhydride in the presence of a lower alkanoic acid. CONSTITUTION:Boric anhyhride is reacted with a lower alkanoic acid anhydride (e.g. acetic anhydride, propionic anhydride, butyric anhydride, valeric anhydride, pivalic anhydride or hexanoic anhydride) in the presence of a lower alkanoic acid (e.g. acetic acid, propionic acid, butyric acid, valeric acid, pivalic acid or hexanoic acid) preferably at room temperature-150 deg.C for 0.5-2 hours to give the aimed compound. The amount of the lower alkanoic acid used is preferably 1-50 pts.wt. based on 1 pt.wt. boric anhydride.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、トリ低級アルカノイルオキシホウ素の製造法
に関する。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a process for producing tri-lower alkanoyloxyboron.

従来の技術及びその問題点 従来トリ低級アルカノイルオキシホウ素は、ホウ酸と無
水低級アルカン酸とを反応させることにより製造されて
いる[A、Plctet and A、Ge1ezno
ff。
BACKGROUND ART AND PROBLEMS Conventionally, tri-lower alkanoyloxyboron is produced by reacting boric acid with lower alkanoic anhydride [A, Plctet and A, Ge1ezno
ff.

Ber、、38.2219(1903) 、 Ia+p
erial ChemicalIndustries 
Ltd、Br1t、、1357955(1974)参照
]。
Ber, 38.2219 (1903), Ia+p
erial Chemical Industries
Ltd, Brlt, 1357955 (1974)].

しかしながら、この方法によれば、急激な発熱を伴い爆
発の危険性があり[Leon M、Lerner、Ch
em。
However, this method involves the risk of explosion due to rapid heat generation [Leon M., Lerner, Ch.
em.

Eng、News、1973.51(34)] 、また
反応時間も長い等操作が煩雑で、大量合成を行ない得す
、従って工業的製法として不適当であるという欠点を有
している。
Eng, News, 1973.51 (34)], and the process is complicated, such as requiring a long reaction time, and requires large-scale synthesis, making it unsuitable as an industrial production process.

一方、無水ホウ酸と無水低級アルカン酸とを反応させる
ことによりトリ低級アルカノイルオキシホウ素を得る方
法も知られている[A、Pictet andA、Ge
1eznoff、Ber、、 36.2219(190
3)参照]。
On the other hand, a method for obtaining tri-lower alkanoyloxyboron by reacting boric anhydride and lower alkanoic anhydride is also known [A, Pictet and A, Ge
1eznoff, Ber,, 36.2219 (190
See 3)].

しかしながらミこの方法によれば、反応が非常に不活性
であり、長時間の加熱を必要とし、これにより目的物を
高収率、高純度で製造し難いという欠点を有している。
However, this method has the disadvantage that the reaction is very inert and requires long heating times, making it difficult to produce the desired product in high yield and purity.

問題点を解決するための手段 本発明は、上記欠点を有しないトリ低級アルカノイルオ
キシホウ素の製造法を提供するものである。
Means for Solving the Problems The present invention provides a process for producing tri-lower alkanoyloxyboron which does not have the above-mentioned disadvantages.

即ち、本発明は、低級アルカン酸の存在下に無水ホウ酸
と無水低級アルカン酸とを反応させることを特徴とする
トリ低級アルカノイルオキシホウ素の製造法に係る。
That is, the present invention relates to a method for producing tri-lower alkanoyloxyboron, which is characterized by reacting boric anhydride and lower alkanoic anhydride in the presence of a lower alkanoic acid.

本発明で得られるトリ低級アルカノイルオキシホウ素は
、抗菌剤を合成するための中間体として有用な一般式 [式中R1は低級アルキル基、X及びXIはそれぞれハ
ロゲン原子を示す。R2は基 10 COR3(R3及びR4はそれぞれ低−B−〇C
OR’ 級アルキル基)を示す。] で表わされるベンゾヘテロ環化合物及びその塩を製造す
る際の有用な試薬である。例えば上記一般式(1)のベ
ンゾヘテロ環化合物は、下記反応式に従い製造される。
The tri-lower alkanoyloxyboron obtained in the present invention has the general formula [wherein R1 is a lower alkyl group, and X and XI each represent a halogen atom], which is useful as an intermediate for synthesizing antibacterial agents. R2 is a group 10 COR3 (R3 and R4 are each a low-B-○C
OR' class alkyl group). ] It is a useful reagent in producing the benzoheterocyclic compound and its salt. For example, the benzoheterocyclic compound of the above general formula (1) is produced according to the following reaction formula.

[反応式−1コ [式中R1、R2、R3、R4、X及びXlは前記に同
じ。R5は低級アルキル基を示す。R6は水素原子又は
低級アルキル基を示す。]一般般式1a)の化合物と本
発明の一般式(2)の化合物の反応は、適当な溶媒中に
て行なわれる。
[Reaction formula-1] [In the formula, R1, R2, R3, R4, X and Xl are the same as above. R5 represents a lower alkyl group. R6 represents a hydrogen atom or a lower alkyl group. ] The reaction between the compound of general formula 1a) and the compound of general formula (2) of the present invention is carried out in a suitable solvent.

ここで使用される溶媒としては、例えばジエチルエーテ
ル、ジオキサン、テトラヒドロフラン、モノグライム、
ジグライム等のエーテル類、ベンゼン、トルエン、キシ
レン等の芳香族炭化水素類、n−へキサン、ヘプタン、
シクロヘキサン等の脂肪族炭化水素類、無水酢酸等の無
水低級アルカン酸類、ジメチルホルムアミド(DMF)
 、ジメチルスルホキシド(DMSO) 、>キサメチ
ルリン酸トリアミド(I(MPA) 、アセトニトリル
、N−メチルビロリドン等の非プロトン性極性溶媒等が
挙げられる。該反応は、通常室温〜200℃程度、好ま
しくは室温〜150℃付近にて進行し、一般に10分〜
5時間程度にて終了する。一般式(2)の化合物の使用
量は、一般式(1a)の化合物に対して少なくとも等モ
ル程度、好ましくは等モル−10倍モルとするのがよい
Examples of the solvent used here include diethyl ether, dioxane, tetrahydrofuran, monoglyme,
Ethers such as diglyme, aromatic hydrocarbons such as benzene, toluene, xylene, n-hexane, heptane,
Aliphatic hydrocarbons such as cyclohexane, lower alkanoic anhydrides such as acetic anhydride, dimethylformamide (DMF)
, dimethylsulfoxide (DMSO), >xamethylphosphoric acid triamide (I (MPA)), acetonitrile, N-methylpyrrolidone, and other aprotic polar solvents.The reaction is usually carried out at room temperature to about 200°C, preferably room temperature to 150°C Proceeds around ℃, generally 10 minutes ~
It will be completed in about 5 hours. The amount of the compound of general formula (2) to be used is at least equimolar to the compound of general formula (1a), preferably equimolar to 10 times the molar amount.

ここで、一般式(1)の化合物は、例えば抗菌剤として
有用な一般式 [式中R1及びXは前記に同じ。R7は基−A −N  N−R8(R8は水素原子又は低級アル℃−1 素原子、硫黄原子又はメチレン基を示す。mは′1又は
2を示す。R9は水素原子、低級アルキル基、低級アル
コキシ基、水酸基、フェニル低級アルキル基、低級アル
カノイルオキシ基、置換基として低級アルキル基又は低
級アルカノイル基を有することのあるアミノ基、オキソ
基又はカルバモイル基を示す。)を示す。]で表わされ
るベンゾヘテロ環化合物を合成するための中間体として
有用である。
Here, the compound of general formula (1) is, for example, a compound of the general formula [wherein R1 and X are the same as above] useful as an antibacterial agent. R7 represents a group -A-N N-R8 (R8 represents a hydrogen atom, a lower alkyl atom, a sulfur atom, or a methylene group; m represents '1 or 2; R9 represents a hydrogen atom, a lower alkyl group, Indicates a lower alkoxy group, a hydroxyl group, a phenyl lower alkyl group, a lower alkanoyloxy group, an amino group, an oxo group, or a carbamoyl group that may have a lower alkyl group or a lower alkanoyl group as a substituent. ] It is useful as an intermediate for synthesizing the benzoheterocyclic compound represented by

一般式(1)の化合物を合成中間体として用いると、一
般式(A)のベンゾヘテロ環化合物を緩和な条件下、短
時間で、高収率、高純度にてしかも工業的規模にて製造
することができる。
When the compound of general formula (1) is used as a synthetic intermediate, the benzoheterocyclic compound of general formula (A) can be produced in a short time under mild conditions, in high yield, and with high purity, and on an industrial scale. be able to.

また一般式(A)の化合物は、上記一般式(1)の化合
物と一般式R7H(R7は前記と同じ)で表わされる化
合物とから、下記に示す方法によっても製造され得る。
Further, the compound of general formula (A) can also be produced by the method shown below from the compound of general formula (1) above and a compound represented by general formula R7H (R7 is the same as above).

[反応式−2] (1)              (A’ )[式中
R1、R2、R7、XI及びXは前記に同じ。] 一般式(1)の化合物と一般式(3)の化合物との反応
において、両者の使用割合は特に限定がなく広い範囲か
ら適宜選択できるが、通常前者に対して後者を少なくと
も等モル程度、好ましくは等モル−5倍モル程度使用す
るのがよい。該反応は不活性溶媒、具体的には水、メタ
ノール、エタノール、イソプロパツール、ブタノール、
アミルアルコール、イソアミルアルコール等のアルコー
ル類、ベンゼン、トルエン、キシレン等の芳香族炭化水
素類、テトラヒドロフラン、ジオキサン、ジグライム等
のエーテル類、ジメチルアセタミド、DMFSDMSO
lHMPA、アセトニトリル、N−メチルピロリドン等
又はこれらの混合溶媒中で行なわれる。これらのうちD
MF、DMSO。
[Reaction Formula-2] (1) (A') [In the formula, R1, R2, R7, XI and X are the same as above. ] In the reaction between the compound of general formula (1) and the compound of general formula (3), the ratio of the two used is not particularly limited and can be appropriately selected from a wide range, but usually the latter is at least equimolar to the former, Preferably, it is used in an equimolar amount to about 5 times the molar amount. The reaction is carried out in an inert solvent, specifically water, methanol, ethanol, isopropanol, butanol,
Alcohols such as amyl alcohol and isoamyl alcohol, aromatic hydrocarbons such as benzene, toluene and xylene, ethers such as tetrahydrofuran, dioxane and diglyme, dimethylacetamide, DMFSDMSO
The reaction is carried out in a solvent such as lHMPA, acetonitrile, N-methylpyrrolidone, etc. or a mixed solvent thereof. Among these, D
MF, DMSO.

HMPA1アセトニトリル及びN−メチルピロリドンが
好ましい。また該反応は脱酸剤、具体的には炭酸ナトリ
ウム、炭酸カリウム、炭酸水素ナトリウム、炭酸水素カ
リウム、水素化ナトリウム等の無機炭酸塩類、ピリジン
、キノリン、トリエチルアミン等の有機塩基類等の存在
下に行なうこともできる。また弗化カリウム等のアルカ
リ金属ハロゲン化物を添加してもよい。反応は通常1〜
20気圧、好ましくは1〜10気圧の圧力下、室温〜2
50℃程度、好ましくは室温〜200°Cの温度下に行
なわれ、一般に10分〜30時間程度で終了する。
HMPA1 acetonitrile and N-methylpyrrolidone are preferred. The reaction is carried out in the presence of a deoxidizing agent, specifically inorganic carbonates such as sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, and sodium hydride, and organic bases such as pyridine, quinoline, and triethylamine. You can also do it. Further, an alkali metal halide such as potassium fluoride may be added. The reaction is usually 1~
Under a pressure of 20 atm, preferably 1 to 10 atm, room temperature to 2
The process is carried out at a temperature of about 50°C, preferably room temperature to 200°C, and is generally completed in about 10 minutes to 30 hours.

上記で製造された一般式(A′)の化合物を酸又は塩基
性化合物で処理することによりキレートを分解させ、対
応するR2が水素原子である化合物(A)に導くことが
できる。ここで使用される酸としては、塩酸、硫酸等の
鉱酸、酢酸、p−)ルエンスルホン酸等の有機酸が挙げ
られる。塩基性化合物としては、水酸化ナトリウム、水
酸化カリウム、炭酸水素ナトリウム、炭酸水素カリウム
、炭酸カリウム等の無機塩基、トリエチルアミン等の有
機塩基が挙げられる。該反応は、0〜150℃程度、好
ましくは0〜100″C付近にて好適に進行する。酸又
は塩基性化合物の使用量しては、原料化合物に対して通
常少なくとも等モル程度、好ましくは1〜10倍量使用
するのがよい。
By treating the compound of general formula (A') produced above with an acid or basic compound, the chelate can be decomposed, leading to the corresponding compound (A) in which R2 is a hydrogen atom. Examples of acids used here include mineral acids such as hydrochloric acid and sulfuric acid, and organic acids such as acetic acid and p-)luenesulfonic acid. Examples of the basic compound include inorganic bases such as sodium hydroxide, potassium hydroxide, sodium hydrogen carbonate, potassium hydrogen carbonate, and potassium carbonate, and organic bases such as triethylamine. The reaction proceeds suitably at about 0 to 150°C, preferably around 0 to 100"C. The amount of the acid or basic compound to be used is usually at least about equimolar, preferably at least equimolar to the starting material compound. It is best to use 1 to 10 times the amount.

本発明の方法は、低級アルカン酸の存在下、無水ホウ酸
と無水低級アルカン酸とを反応させることにより実施さ
れる。
The method of the present invention is carried out by reacting boric anhydride and lower alkanoic anhydride in the presence of a lower alkanoic acid.

本明細書において、低級アルカノイルオキシ基としては
、例えばアセチルオキシ、プロピオニルオキシ、ブチリ
ルオキシ、イソブチリルオキシ、ペンタノイルオキシ、
tert−ブチルカルボニルオキシ、ヘキサノイルオキ
シ基等の炭素数2〜6の直鎖又は分枝鎖状アルカノイル
オキシ基が挙げられる。
In this specification, examples of the lower alkanoyloxy group include acetyloxy, propionyloxy, butyryloxy, isobutyryloxy, pentanoyloxy,
Examples include straight-chain or branched alkanoyloxy groups having 2 to 6 carbon atoms, such as tert-butylcarbonyloxy and hexanoyloxy groups.

無水低級アルカン酸としては、例えば無水酢酸、無水プ
ロピオン酸、無水酪酸、無水イソ酪酸、無水吉草酸、無
水イソ吉草酸、無水ピバリン酸、無水ヘキサン酸等の炭
素数2〜6の直鎖又は分枝鎖状無水アルカン酸を挙げる
ことができる。
Examples of lower alkanoic anhydrides include linear or branched carbon atoms having 2 to 6 carbon atoms, such as acetic anhydride, propionic anhydride, butyric anhydride, isobutyric anhydride, valeric anhydride, isovaleric anhydride, pivalic anhydride, and hexanoic anhydride. Mention may be made of branched alkanoic anhydrides.

低級アルカン酸としては、例えば酢酸、プロピオン酸、
酪酸、イン酪酸、吉草酸、イソ吉草酸、ピバリン酸、ヘ
キサン酸等の炭素数2〜6の直鎖又は分枝鎖状アルカン
酸を挙げることができる。
Examples of lower alkanoic acids include acetic acid, propionic acid,
Examples include straight-chain or branched alkanoic acids having 2 to 6 carbon atoms, such as butyric acid, inbutyric acid, valeric acid, isovaleric acid, pivalic acid, and hexanoic acid.

本発明の反応は、通常室温〜200 ”C1好まし−く
は室温〜150℃付近にて行なわれ、一般に0.5〜2
時間程度で終了する。
The reaction of the present invention is usually carried out at room temperature to 200°C, preferably around room temperature to 150°C, and generally at 0.5 to 200°C.
It will finish in about an hour.

本−発明において、無水低級アルカン酸は、無水ホウ酸
に対して通常大過剰量、好ましくは3〜20倍モル量使
用するのがよい。また低級アルカン酸の使用量としては
、特に限定されず、通常無水ホウ酸に対して1〜50倍
重量使用するのがよい。
In the present invention, the lower alkanoic anhydride is usually used in a large excess amount, preferably 3 to 20 times the molar amount, relative to the boric anhydride. The amount of the lower alkanoic acid to be used is not particularly limited, but it is usually 1 to 50 times the weight of boric anhydride.

斯くして得られる本発明の目的化合物は、通常の分離手
段により容易に単離、精製できる。該分離手段としては
、例えば溶媒抽出法、希釈法、再結晶法、カラムクロマ
トグラフィー、プレパラティブ薄層クロマトグラフィー
等が挙げられる。
The target compound of the present invention thus obtained can be easily isolated and purified by conventional separation means. Examples of the separation means include solvent extraction, dilution, recrystallization, column chromatography, and preparative thin layer chromatography.

発明の効果 本発明による製造法は、従来の方法に比し、反応時間が
短く、爆発の危険性もな(、また反応操作は極めて簡便
であり、高収率、高純度にて大量合成も容易であり、従
って工業的に極めて有利な方法である。
Effects of the Invention Compared to conventional methods, the production method according to the present invention has a shorter reaction time and no risk of explosion (also, the reaction operation is extremely simple, and large-scale synthesis is possible with high yield and high purity). This method is easy and therefore industrially extremely advantageous.

実  施  例 以下に実施例及び参考例を掲げて本発明をより一層明ら
かにする。
EXAMPLES Examples and reference examples are given below to further clarify the present invention.

実施例1 無水ホウ酸0.56g、無水酢酸9.2g及び酢酸2.
9gを混合し、均一溶液になるまで約1時間加熱還流す
る。反応終了後、反応液を濃縮し、得られた残渣に石油
エーテルを加え、析出する結晶を枦取し、これを乾燥さ
せてトリアセチルオキシホウ素3.0g(収率98.5
%)を得る。
Example 1 0.56 g of boric anhydride, 9.2 g of acetic anhydride, and 2.0 g of acetic acid.
Mix 9 g and heat under reflux for about 1 hour until a homogeneous solution is obtained. After the reaction was completed, the reaction solution was concentrated, petroleum ether was added to the resulting residue, the precipitated crystals were collected and dried to give 3.0 g of triacetyloxyboron (yield: 98.5).
%).

融点121℃、白色結晶 元素分析(Cs H906Bとして) CH 計算値(%)  38,34  4.83実測値(%)
 38.56  4.95参考例1 8.9−ジフルオロ−5−メチル−6,7−シヒドロー
1−オキソ−IH,5H−ベンゾ[ij]キノリジン−
2−カルボン酸 −B (OCOCH3)2キレート0.81g、4−ヒ
ドロキシピペリジン0.81g及びアセトニトリル2.
811112を混合し、50〜80℃にて30分〜4時
間攪拌する。反応混合物に濃塩酸8.1鯨を加え、10
分間加熱還流後冷却し、析出晶を枦取する。50%エタ
ノールより再結晶して0.50gの9−フルオロ−8−
(4−ヒドロキシ−1−ピペリジニル)−5−メチル−
6,7−シヒドロー1−オキソ−IH,5H−ベンゾ[
ijlキノリジン−2−カルボン酸を得る。
Melting point 121°C, white crystal Elemental analysis (as Cs H906B) CH Calculated value (%) 38,34 4.83 Actual value (%)
38.56 4.95 Reference Example 1 8.9-difluoro-5-methyl-6,7-sihydro-1-oxo-IH,5H-benzo[ij]quinolidine-
2-carboxylic acid-B (OCOCH3) 2 chelate 0.81 g, 4-hydroxypiperidine 0.81 g and acetonitrile 2.
811112 and stirred at 50 to 80°C for 30 minutes to 4 hours. Concentrated hydrochloric acid 8.1 was added to the reaction mixture, and 10
After heating under reflux for a minute, the mixture is cooled and the precipitated crystals are collected. Recrystallized from 50% ethanol to obtain 0.50 g of 9-fluoro-8-
(4-hydroxy-1-piperidinyl)-5-methyl-
6,7-Sihydro-1-oxo-IH,5H-benzo[
ijl quinolidine-2-carboxylic acid is obtained.

融点247℃(分解)、白色結晶 参考例2 8.9−ジフルオロ−5−メチル−6,7−シヒドロー
1−オキソ−IH,5H−ベンゾ[ijlキノリジン−
2−カルボン酸 −B (OCOCHa )2キレ−)3.46gを用い
、参考例2と同様にして9−フルオロ−8−(4−メチ
ル−1−ピペラジニル)−5−メチル−6,7−シヒド
ロー1−オキソ−IH,5H−ベンゾ[ij]キノリジ
ン−2−カルボン酸を27.48g得る。
Melting point: 247°C (decomposed), white crystals Reference Example 2 8.9-difluoro-5-methyl-6,7-sihydro-1-oxo-IH,5H-benzo[ijlquinolidine-
9-Fluoro-8-(4-methyl-1-piperazinyl)-5-methyl-6,7- was prepared in the same manner as in Reference Example 2 using 3.46 g of 2-carboxylic acid-B (OCOCHa) 27.48 g of sihydro-1-oxo-IH,5H-benzo[ij]quinolidine-2-carboxylic acid are obtained.

融点261℃(分解)、白色結晶 参考例3 無水ホウ酸24.8g、無水酢酸407脱及び酢酸12
3脱を混合し、均一溶液になるまで約1時間加熱還流す
る。得られたトリアセチルオキ・シホウ素は、単離する
ことなく、上記反応液に8゜9−ジフルオロ−5−メチ
ル−6,7−シヒドロー1−オキソ−IH,5H−ベン
ゾ[ij]キノリジン−2−カルボン酸182gを加え
、更に1時間加熱還流する。その後溶媒を濃縮後、更に
トルエン共沸を繰り返した後、トルエンを留去する。
Melting point 261°C (decomposition), white crystals Reference example 3 Boric anhydride 24.8g, acetic anhydride 407 removed and acetic acid 12
Mix the three solutions and heat to reflux for about 1 hour until a homogeneous solution is obtained. The obtained triacetyloxy cyboron was added to the above reaction solution without isolation. Add 182 g of 2-carboxylic acid and heat under reflux for an additional hour. Thereafter, after concentrating the solvent, toluene azeotropy is repeated, and then toluene is distilled off.

265.37gの8,9−ジフルオロ−5−メチル−6
,7−シヒドロー1−オキソ−IH,5H−ベンゾ[i
j]キノリジン−2−カルボン酸−B (OCOCHa
 )2キレートを得る。
265.37 g of 8,9-difluoro-5-methyl-6
,7-sihydro-1-oxo-IH,5H-benzo[i
j] Quinolidine-2-carboxylic acid-B (OCOCHa
)2 chelates are obtained.

融点205℃(分解)、白色結晶 参考例4 参考例3と同様にして適当な出発原料を用いて以下の化
合物を得る。
Melting point: 205°C (decomposed), white crystals Reference Example 4 The following compound was obtained in the same manner as in Reference Example 3 using appropriate starting materials.

8−ブロモ−9−フルオロ−5−メチル−6゜7−シヒ
ドロー1−オキソ−IH,5H−ベンゾCL j]キノ
リジン−2−カルボン酸−B(OCOCH3)zキレー
ト 融点215℃(分解)、白色結晶 (以 上)
8-bromo-9-fluoro-5-methyl-6゜7-sihydro-1-oxo-IH,5H-benzoCL j]quinolidine-2-carboxylic acid-B (OCOCH3) z Chelate melting point 215 °C (decomposition), white Crystal (and above)

Claims (1)

【特許請求の範囲】[Claims] (1)低級アルカン酸の存在下に無水ホウ酸と無水低級
アルカン酸とを反応させることを特徴とするトリ低級ア
ルカノイルオキシホウ素の製造法。
(1) A method for producing tri-lower alkanoyloxyboron, which comprises reacting boric anhydride and lower alkanoic anhydride in the presence of a lower alkanoic acid.
JP923489A 1989-01-17 1989-01-17 Method for producing tri-lower alkanoyloxyboron Expired - Lifetime JP2731853B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP923489A JP2731853B2 (en) 1989-01-17 1989-01-17 Method for producing tri-lower alkanoyloxyboron

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JPH02188589A true JPH02188589A (en) 1990-07-24
JP2731853B2 JP2731853B2 (en) 1998-03-25

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Country Link
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US6608078B2 (en) 2000-05-08 2003-08-19 Wockhardt Limited Antibacterial chiral 8-(substituted piperidino)-benzo [i,j] quinolizines, processes, compositions and methods of treatment
US6664267B1 (en) 2002-05-28 2003-12-16 Wockhardt Limited Crystalline fluoroquinolone arginine salt form
US6750224B1 (en) 1999-05-07 2004-06-15 Wockhardt Limited Antibacterial optically pure benzoquinolizine carboxylic acids, processes, compositions and methods of treatment
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US7098219B2 (en) 2000-08-01 2006-08-29 Wockhart Limited Inhibitors of cellular efflux pumps of microbes
US7164023B2 (en) 2003-09-04 2007-01-16 Wockhardt Limited Benzoquinolizine-2-carboxylic acid arginine salt tetrahydrate
US7247642B2 (en) 1999-05-07 2007-07-24 Wockhardt Limited Antibacterial optically pure benzoquinolizine carboxylic acids, processes, compositions and methods of treatment

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7247642B2 (en) 1999-05-07 2007-07-24 Wockhardt Limited Antibacterial optically pure benzoquinolizine carboxylic acids, processes, compositions and methods of treatment
US6750224B1 (en) 1999-05-07 2004-06-15 Wockhardt Limited Antibacterial optically pure benzoquinolizine carboxylic acids, processes, compositions and methods of treatment
US6753333B2 (en) 1999-12-14 2004-06-22 Wockhardt Limited Chiral fluoroquinolone arginine salt forms
US6608078B2 (en) 2000-05-08 2003-08-19 Wockhardt Limited Antibacterial chiral 8-(substituted piperidino)-benzo [i,j] quinolizines, processes, compositions and methods of treatment
US7098219B2 (en) 2000-08-01 2006-08-29 Wockhart Limited Inhibitors of cellular efflux pumps of microbes
US6514986B2 (en) 2000-11-22 2003-02-04 Wockhardt Limited Chiral fluoroquinolone arginine salt forms
US6964966B2 (en) 2001-04-25 2005-11-15 Wockhardt Limited Generation triple-targeting, chiral, broad-spectrum antimicrobial 7-substituted piperidino-quinolone carboxylic acid derivatives, their preparation, compositions and use as medicaments
US6878713B2 (en) 2001-04-25 2005-04-12 Wockhardt Limited Generation triple-targeting, chiral, broad-spectrum antimicrobial 7-substituted piperidino-quinolone carboxylic acid derivatives, their preparation, compositions and use as medicaments
US7393957B2 (en) 2001-04-25 2008-07-01 Wockhardt Limited Generation triple-targeting, chiral, broad-spectrum antimicrobial 7-substituted piperidino-quinolone carboxylic acid derivatives, their preparation, compositions and use as medicaments
US7626032B2 (en) 2001-04-25 2009-12-01 Wockhardt Limited Generation triple-targeting, chiral, broad-spectrum antimicrobial 7-substituted piperidino-quinolone carboxylic acid derivatives, their preparation, compositions and use as medicaments
US7132541B2 (en) 2002-05-28 2006-11-07 Wockhardt Limited Crystalline fluoroquinolone arginine salt form
US6664267B1 (en) 2002-05-28 2003-12-16 Wockhardt Limited Crystalline fluoroquinolone arginine salt form
US7164023B2 (en) 2003-09-04 2007-01-16 Wockhardt Limited Benzoquinolizine-2-carboxylic acid arginine salt tetrahydrate

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