JPS5872588A - Production of pyrido(1,2,3-de)-1,4-benzoxazine derivative - Google Patents

Production of pyrido(1,2,3-de)-1,4-benzoxazine derivative

Info

Publication number
JPS5872588A
JPS5872588A JP17162181A JP17162181A JPS5872588A JP S5872588 A JPS5872588 A JP S5872588A JP 17162181 A JP17162181 A JP 17162181A JP 17162181 A JP17162181 A JP 17162181A JP S5872588 A JPS5872588 A JP S5872588A
Authority
JP
Japan
Prior art keywords
compound
give
alkyl
formula
dihydro
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
JP17162181A
Other languages
Japanese (ja)
Other versions
JPS621953B2 (en
Inventor
Yoshiaki Tanaka
良明 田中
Isao Hayakawa
勇夫 早川
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.)
Daiichi Pharmaceutical Co Ltd
Original Assignee
Daiichi Pharmaceutical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daiichi Pharmaceutical Co Ltd filed Critical Daiichi Pharmaceutical Co Ltd
Priority to JP17162181A priority Critical patent/JPS5872588A/en
Publication of JPS5872588A publication Critical patent/JPS5872588A/en
Publication of JPS621953B2 publication Critical patent/JPS621953B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

PURPOSE:2,3,4-Trifluoronitrobenzene, as a starting compound, is subjected to hydrolysis, condensation reaction, catalytic reduction, formation of pyridine ring and the reaction of N-alkylpiperazine to give the titled compound used as an antibiotic. CONSTITUTION:Selective hydrolysis of a compound of formulaIin the presence of a strong base such as potassium hydroxide gives a compound of formula II. The product is made to react with halomethyl alkyl ketone of XCH2COR1 in the presence of an acid acceptor, then a catalytic amount of KI and the resultant intermediate is subjected to catalytic hydrogenation to give a compound of formula III. The product, directly or after it is converted into an inorganic acid salt of formula III', is condensed with dialkyl aminomethylenemalonate to give the compound of formula IV. Then, the product is heated in polyphosphoric acid to form a pyridine ring, and hydrolyzed to give a compound of formula V. Finally, N-alkylpiperazine is heated with the compound to give the objective compound of formula VI.

Description

【発明の詳細な説明】 本発明は3−アルキル−9−フルオロ−1〇−(4−ア
ルキル−1−ピペラジニル)−7−オキソ−2,8−ジ
ヒドE”−7H−ピリド(1,!、8−1e)−1,4
−ベンゾオキサジン−6−カルボン酸の製造法に関する
ものであり、このものはダラム陽性菌およびダラム陰性
菌に対して強い抗菌活性を示し、抗菌薬として使用する
ことが、  できる。
DETAILED DESCRIPTION OF THE INVENTION The present invention provides 3-alkyl-9-fluoro-10-(4-alkyl-1-piperazinyl)-7-oxo-2,8-dihyde E''-7H-pyrido (1,! , 8-1e)-1,4
This invention relates to a method for producing -benzoxazine-6-carboxylic acid, which exhibits strong antibacterial activity against Durum-positive and Durum-negative bacteria, and can be used as an antibacterial agent.

本発明の製造法を反応式で示して説明する。The production method of the present invention will be explained using a reaction formula.

ff)          (W) (式中、R1および−は同じまたは異なるアルキル基を
、Xはハロゲン原子を、 R’、−は低級アルキル基を
示す。) t’Eわち* L8,4−トリフルオロニトロペンイン
(1)をジメチルスルホキシド、スルホラン等の溶媒中
、水酸化カリウム、水酸化ナトリウムの如き強塩基の存
在下に室温で攪拌すると、ニトリ基のオルト位に置換し
た弗素原子のみが選択的に加水分解されて、2,8−ジ
フルオロ−6−二)$11フェノール(りを収率よく得
ることができる。化合物値)を脱酸剤として炭酸カリウ
ムまたは炭酸ナトリウムを用い、触媒量の沃化カリウム
の存在下にハロメチルアルキルケトン(10%00Fh
 )と反応させて得られる中間体をラネー・二、ケル、
パラジウム炭等の触媒の存在下常圧で接触還元するとオ
キサジン環が形成され、3−アルキル−7,8−ジフル
オロ−2,8−ジヒド0−411−1.4−ベンゾオキ
サジン(夏)を収率よく得ることができる。化合物側)
は遊離塩基のまま、または無機酸塩(厘1例えば111
酸jJ[)として、ジアルキルアミノメチレンマシン酸
エステルと加熱すると高収率で(8−アルキル−7,8
−ジフルオD−s、S−ジヒドロ−41[−1,4−ベ
ンゾオキサジン−4−イル)メチレンマロン酸エステル
(il)を得ることができる。つぎに、化合物(至)を
ポリリン酸またはそのエステル中で加熱すると、ピリジ
ン環閉環反応が起り。
ff) (W) (In the formula, R1 and - are the same or different alkyl groups, X is a halogen atom, and R', - are lower alkyl groups.) t'E, *L8,4-trifluoro When nitropenine (1) is stirred at room temperature in a solvent such as dimethyl sulfoxide or sulfolane in the presence of a strong base such as potassium hydroxide or sodium hydroxide, only the fluorine atom substituted at the ortho position of the nitri group is selectively removed. Hydrolyzed, 2,8-difluoro-6-di) $11 phenol (compound value) can be iodized in a catalytic amount using potassium carbonate or sodium carbonate as a deoxidizing agent. Halomethylalkylketone (10%00Fh) in the presence of potassium
) and the intermediate obtained by reacting with Raney-2, Kel,
Catalytic reduction at normal pressure in the presence of a catalyst such as palladium charcoal forms an oxazine ring, yielding 3-alkyl-7,8-difluoro-2,8-dihydro-0-411-1,4-benzoxazine (summer). You can get it easily. compound side)
can be used as a free base or as an inorganic acid salt (e.g. 111
When heated with dialkylamino methylene macinic acid ester as acid jJ[), (8-alkyl-7,8
-difluoroD-s,S-dihydro-41[-1,4-benzoxazin-4-yl)methylenemalonic acid ester (il) can be obtained. Next, when the compound (2) is heated in polyphosphoric acid or its ester, a pyridine ring closure reaction occurs.

ついで、酸または塩基中で処!するとカルボン酸のエス
テルが加水分解されて3−アルキル−9,10−ジフル
オロ−7−オキソ−s、s−ジヒ)”a−?H−ピリド
(1,!、11、−68 ) −1,4−ベンゾオキす
ジン−6−カルボン酸(至)を得ることができる。本化
合物を鍼−アルキルビペラジンと加熱反応させると3−
アルキル−9−フルオ田−10−(4−アルキル−1−
ピペラジニル)−7−オキソ−s、s−ジヒドu−11
1−ピリド(1,S、@−as ) −1,4−ベンゾ
オキすジン−6−カルボン酸(資)が高収率で得られる
Then, place it in an acid or base! Then, the carboxylic acid ester is hydrolyzed to form 3-alkyl-9,10-difluoro-7-oxo-s,s-dihi)"a-?H-pyrido(1,!,11,-68)-1, 4-benzooxazine-6-carboxylic acid can be obtained.When this compound is heated and reacted with acupuncture-alkyl biperazine, 3-
Alkyl-9-fluoro-10-(4-alkyl-1-
piperazinyl)-7-oxo-s,s-dihydro-11
1-pyrido(1,S,@-as)-1,4-benzoxazine-6-carboxylic acid is obtained in high yield.

本発明の化合物の最小発育阻止濃度を次表に示すO つぎに実施例を記載する。The minimum inhibitory concentrations of the compounds of the present invention are shown in the table below. Next, examples will be described.

実施例1 S、8.4− )リフルオーニトロベンゼンmayをジ
メチルスルホキシド100−に溶かし。
Example 1 S, 8.4-) Refluoronitrobenzene may be dissolved in dimethyl sulfoxide 100-.

18〜30℃でSOW水酸化カリウム水溶液6s−を滴
下し、同温度で5時間攪拌する。反応液に水500−を
加えてクロロホルムと振とりする0水層を分取し、塩酸
で酸性としたのちクロロホルムで抽出する0抽出液は水
洗し、芒硝で乾燥したのち、クロロホルムを留去すると
融点61”CのS、S−ジフルオロ−6−二トロフエノ
ール16.99(85,6%)を得る。
6 seconds of SOW potassium hydroxide aqueous solution is added dropwise at 18 to 30°C, and the mixture is stirred at the same temperature for 5 hours. Add 500% of water to the reaction solution and shake with chloroform. Separate the aqueous layer, make it acidic with hydrochloric acid and extract with chloroform. Wash the extract with water, dry with sodium sulfate, and distill off the chloroform. 16.99 (85.6%) of S,S-difluoro-6-nitrophenol with melting point 61"C is obtained.

元素分析値 Os Hs F*N Osとして計算値 
0 41.16.  H1,7B、  N  &GO分
析値 0 4G、96. 11 1.?s、  N  
&1m上記化合物6.1F、七ツクpルア七トン5.0
−9炭酸カリウム8.0gおよび沃化カリウムo、sp
をア七トン10G−に加えて4時間還流する。今後、不
溶物を濾去し、溶媒を留去して残渣をペン(ンに溶かし
、水洗後、芒硝で乾燥する。溶媒を留去すると油状物と
して3−アセトニルオキシ−3,4−ジフルオロニド四
ベン、ジン11.5F(81,0%)を得る。
Elemental analysis value Os Hs F*N Calculated value as Os
0 41.16. H1,7B, N & GO analysis value 0 4G, 96. 11 1. ? s, N
&1m The above compound 6.1F, 7p Lua 5.0
-9 Potassium carbonate 8.0 g and potassium iodide o, sp
was added to 10G of amethyst and refluxed for 4 hours. From now on, insoluble materials are filtered off, the solvent is distilled off, and the residue is dissolved in pen, washed with water, and dried with Glauber's salt. When the solvent is distilled off, 3-acetonyloxy-3,4-difluoro Nidotetrabenzine 11.5F (81.0%) is obtained.

元素分析値 −〇7F1NQ4として 計算値 046L16.  HS、06.  N  t
ol1分析値 0 464GI、  M  116. 
 H器、・i上記化合物6.0gをエタノール5o−に
溶かし、ラネー・ニッケル6−を加えて常圧で接触還元
する。理論量の水素を吸収させたのち、触媒を濾去し溶
媒を留去する。残渣をベンゼンに溶かし、6襲塩酸と振
とうすると、7,8−ジフルオE”−3−メチル−g+
i%−ジヒド0−4H−1,4−ベンゾオキサジン塩酸
塩が析出するのでこれを濾取する。融点18g−185
℃、8.5F(78J襲)。
Elemental analysis value - Calculated value as 〇7F1NQ4 046L16. HS, 06. Nt
ol1 analysis value 0 464GI, M 116.
H: Dissolve 6.0 g of the above compound in ethanol 5O-, add Raney nickel 6-O, and perform catalytic reduction at normal pressure. After the theoretical amount of hydrogen has been absorbed, the catalyst is filtered off and the solvent is distilled off. When the residue is dissolved in benzene and shaken with hydrochloric acid, 7,8-difluoroE''-3-methyl-g+
i%-dihydro-4H-1,4-benzoxazine hydrochloride precipitates and is collected by filtration. Melting point 18g-185
℃, 8.5F (78J attack).

上記塩酸塩LO9およびジメチルアミノメチレンマロン
酸ジエチル!、59を氷酢酸zO−に加え、8G−90
℃で5時間攪拌する。溶媒を減圧留去し、残渣をシリカ
ゲルクロマトグラフィーで精製し、ペンゼンークpロホ
ルム(8:S)で溶出する部分から油状物として(?、
8−ジフルオロー3−メチルー2.8−ジヒドロ−4H
−1,4−ベンゾオキサジン−4−イル)メチレンマロ
ン酸ジエチル2.+9(74,s%)を得る。
The above hydrochloride LO9 and diethyl dimethylaminomethylenemalonate! , 59 to glacial acetic acid zO-, 8G-90
Stir at ℃ for 5 hours. The solvent was distilled off under reduced pressure, and the residue was purified by silica gel chromatography, and the fraction eluted with Penzenik proform (8:S) was obtained as an oil (?,
8-difluoro-3-methyl-2,8-dihydro-4H
-1,4-benzoxazin-4-yl)methylene diethyl malonate2. +9 (74, s%) is obtained.

元素分析値 C’17H1GF2NOBとして計算値 
0 6?、46.  H5,8G、  M S、94分
析値 0 67.1!、  H6,8S、  N  1
191上記化合物s、opをポリリン酸エチルt、09
に加えて140〜145℃でり、S時間攪拌する。
Elemental analysis value Calculated value as C'17H1GF2NOB
0 6? , 46. H5,8G, MS, 94 analysis value 0 67.1! , H6,8S, N 1
191 The above compound s, op is converted into ethyl polyphosphate t, 09
In addition, the mixture was heated to 140-145°C and stirred for S hours.

反応液を氷水にあけ、析出物をクロロホルムで抽出する
。抽出液は5襲炭酸カリウム水溶液。
Pour the reaction solution into ice water and extract the precipitate with chloroform. The extract is a 5-stage potassium carbonate aqueous solution.

で1 ついで水會洗い、芒硝で乾燥したのち、溶媒を留去する
と融点161℃の9,1G−ジフルオp−$−メチル−
7−オキソ−s、s−ジヒド田−フH−ピリド(1,1
,S −as ) −1,4−ベンゾオキすジン−6−
カルボン酸エチル1.809(7番、6襲)を得る〇 元素分析値 +11qsH1sF、Mo4として計算値
 CI&!S、  H4!14.  )l 468分析
値 0 1S&111.  H4jlL  M  48
8上記化金物L@Fを濃埴酸−酢酸(1:4)s6−に
溶かし、S時間還流する。今後、析出晶を濾取し、水、
エタノール、エーテルの順に洗い、乾燥すると融点>S
OO℃の・、lO−ジフルオ胃−3−メチルーフ−オキ
ソ−S、S−ジヒド0−7M−ピリド(1,2,8−+
11!I ) −1,4−ベンゾオキサジン−6−カル
ボン酸1.129(811修)を得る。
Then, after washing with water and drying with Glauber's salt, the solvent was distilled off to give 9,1G-difluoro p-$-methyl- with a melting point of 161°C.
7-oxo-s,s-dihydro-F-H-pyrido (1,1
,S-as)-1,4-benzooxdine-6-
Obtain ethyl carboxylate 1.809 (No. 7, 6th attack) 〇 Elemental analysis value +11qsH1sF, calculated value as Mo4 CI &! S, H4!14. ) l 468 analysis value 0 1S & 111. H4jlL M 48
8. The above metal compound L@F was dissolved in concentrated citric acid-acetic acid (1:4) s6- and refluxed for S hours. In the future, the precipitated crystals will be collected by filtration, water,
After washing with ethanol and ether in that order and drying, the melting point >S
OO℃, 10-difluoro-3-methyl-oxo-S,S-dihydro-7M-pyrido(1,2,8-+
11! I) -1,4-benzoxazine-6-carboxylic acid 1.129 (811 modification) is obtained.

元素分析値 (3ul(s F2NO4として計算値 
C65,57,H8,2B、  N  4.98分析値
C55,65,H8,19,N  6.04上記化合物
1.59およびN−メチルピペラジン1.69をジメチ
ルスルホキシド8−に加え。
Elemental analysis value (3ul (s Calculated value as F2NO4
C65,57, H8,2B, N 4.98 Analysis value C55,65, H8,19, N 6.04 Add 1.59 of the above compound and 1.69 of N-methylpiperazine to dimethyl sulfoxide 8-.

ZooN110℃で6時間攪拌する。今後、析出晶を濾
取し、エタノールがら再結晶すると融点!I 5 G 
−467℃〕9− フルto −8−メfルー1G−(
4−メチル−1−ピペラジニル)−ツーオキソ−2,8
−ジヒドロ−7H−ピリド(Xg 8g B −d@ 
) −114−ヘンV k’t tジン−6−カルボン
酸1.4!9(7B、7%)を得る。
Stir at ZooN 110° C. for 6 hours. In the future, if you filter the precipitated crystals and recrystallize from ethanol, the melting point will be reached! I 5 G
-467℃] 9-Full to -8-Mef 1G-(
4-Methyl-1-piperazinyl)-twooxo-2,8
-dihydro-7H-pyrido (Xg 8g B -d@
) -114-hen V k't tgin-6-carboxylic acid 1.4!9 (7B, 7%) is obtained.

元素分析値 偽aHsoWNgo<として計算値 C5
9,8t、  H5,58,N  11.6g分析値 
C69,6!、  H569,M  11.65実施例
3 $−7にトニルオキシ−8,4−ジフルオロニトロベン
(ン6.OfをエタノールsO−に溶カし、ラネー・二
、ケル5−を加えて常圧で接触還元する。理論量の水素
を吸収させたのち、触媒を濾去し、溶媒を留去する0残
渣をベンゼンに溶かし、10%塩酸と振とりする。(析
出物を生じたら1G≦塩酸を追加する) 水層は10%
水酸化ナトリウム水溶液でアルカリ性とし、ベン(ンで
抽出する。ベンゼン層は水洗し芒硝で乾燥したのち溶媒
を留去すると油状物として7.8−ジフルオp−3−メ
チルー2.3−ジヒドロ−4H−ベンゾオキサジン!1
.66F(64鳴)を得る。
Elemental analysis value Calculated value as false aHsoWNgo< C5
9.8t, H5,58,N 11.6g analysis value
C69,6! , H569, M 11.65 Example 3 In $-7, tonyloxy-8,4-difluoronitroben(6.Of) was dissolved in ethanol sO-, and Raney-2-Kel 5- was added thereto at normal pressure. Catalytic reduction. After absorbing the theoretical amount of hydrogen, filter off the catalyst and distill off the solvent. Dissolve the residue in benzene and shake with 10% hydrochloric acid. (If a precipitate forms, reduce 1G≦hydrochloric acid. Add) Water layer is 10%
The benzene layer is made alkaline with an aqueous sodium hydroxide solution and extracted with benzoate.The benzene layer is washed with water and dried over sodium sulfate, and the solvent is distilled off to leave an oily substance. -Benzoxazine!1
.. Get 66F (64 sounds).

上記化合物o、sepおよびジメチルアミノメチレンマ
リン酸ジエチルo、sepを氷酢酸61m/に加え、S
O〜90℃で6時間攪拌する。溶媒を留去し、残液をシ
リカゲルク四マドグラフィーで精製し、ベンゼンークn
uホルム(S:S)で溶出する部分から、油状物として
(テ、8−ジフルオロー3−メチル−3,3−ジヒドロ
−4H−1,4−ベンゾオキサジン−4−イル)メチレ
ンマ田ン酸ジエチルo、78ノ(67,7%ンヲ得る・
The above compounds o, sep and diethyl dimethylaminomethylene malate o, sep were added to 61 m/ml of glacial acetic acid, and S
Stir at 0 to 90°C for 6 hours. The solvent was distilled off, the residual liquid was purified by silica gel chromatography, and benzene
Diethyl (te,8-difluoro-3-methyl-3,3-dihydro-4H-1,4-benzoxazin-4-yl)methylenematanate was obtained as an oil from the part eluted with u-form (S:S). o, 78ノ (get 67.7%)

Claims (1)

【特許請求の範囲】 S、 @、 4−トリフルオルニトロベンゼンを加水分
解して、急、3−ジフルオp−6−ニトa7!ノールヲ
得、これをハリメチルアルキルケトンと縮合し、ついで
触媒の存在下に接触還元して3−アルキル−7,8−ジ
フルオO−S、S−ジヒドロ−4H−1,4−ベンゾオ
キサジンを製し。 これを直接あるいは無機酸塩に誘導したのち。 ジアルキルアミノメチレンマロン酸エステルと縮合させ
て(3−アルキル−7,8−ジフルオp−3.@−ジヒ
ド四−411−1,4−ベンゾオキサジン−4−イル)
メチレンマリン酸エステルを製し、ついでこれをポリリ
ン酸またはポリリン酸エステル中で加熱してピリジン環
を形成させ。 得られた化合物のエステル部分を加水分解してS−アル
キル−9,10−ジフルオ四−7−オキソー2.8−ジ
ヒドロ−7H−ピリド(1,2,8−ae ) −1,
4−ベンゾオキサジン−ローカルポン酸とし、これをN
−アルキルピペラジンと反応させることを特徴とする一
般式 (式中e R1および亀は同じまたは異なるアルキル基
を意味する。)で表わされる8−アルキル−9−フルオ
ロ−10−(4−アルキル−l−ビペラジエル)−7−
オキソ−2,8−ジヒドロ−?H−ピリド(1,2,8
−do)−1,4−ベンゾオキすジン−6−カルボン酸
の製造法
[Claims] S, @, 4-trifluoronitrobenzene is hydrolyzed to suddenly produce 3-difluoro p-6-nito a7! The obtained alcohol was condensed with halimethylalkyl ketone and then catalytically reduced in the presence of a catalyst to produce 3-alkyl-7,8-difluoro-S,S-dihydro-4H-1,4-benzoxazine. death. Either directly or after deriving it into an inorganic acid salt. Condensation with dialkylaminomethylene malonic acid ester (3-alkyl-7,8-difluorop-3.@-dihydro-4-411-1,4-benzoxazin-4-yl)
Methylene malate is prepared and then heated in polyphosphoric acid or polyphosphoric acid ester to form a pyridine ring. The ester moiety of the obtained compound was hydrolyzed to give S-alkyl-9,10-difluoro4-7-oxo2,8-dihydro-7H-pyrido(1,2,8-ae)-1,
4-benzoxazine-local acid, and this is N
8-alkyl-9-fluoro-10-(4-alkyl-l -Viperaziel)-7-
Oxo-2,8-dihydro-? H-pyrido (1,2,8
-do)-1,4-benzokisdine-6-carboxylic acid manufacturing method
JP17162181A 1981-10-27 1981-10-27 Production of pyrido(1,2,3-de)-1,4-benzoxazine derivative Granted JPS5872588A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17162181A JPS5872588A (en) 1981-10-27 1981-10-27 Production of pyrido(1,2,3-de)-1,4-benzoxazine derivative

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17162181A JPS5872588A (en) 1981-10-27 1981-10-27 Production of pyrido(1,2,3-de)-1,4-benzoxazine derivative

Related Child Applications (5)

Application Number Title Priority Date Filing Date
JP18763685A Division JPS61246151A (en) 1985-08-27 1985-08-27 Acetonyloxynitrobenzne derivative
JP18763585A Division JPS61246150A (en) 1985-08-27 1985-08-27 2,3-dilfluoro-6-nitrophenol
JP18763885A Division JPS61246172A (en) 1985-08-27 1985-08-27 Benzoxazinylmalonic acid derivative
JP18763985A Division JPS61246188A (en) 1985-08-27 1985-08-27 Pyrido-1,4-benzoxazine derivative
JP18763785A Division JPS61246171A (en) 1985-08-27 1985-08-27 Benzoxazine derivative

Publications (2)

Publication Number Publication Date
JPS5872588A true JPS5872588A (en) 1983-04-30
JPS621953B2 JPS621953B2 (en) 1987-01-16

Family

ID=15926563

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17162181A Granted JPS5872588A (en) 1981-10-27 1981-10-27 Production of pyrido(1,2,3-de)-1,4-benzoxazine derivative

Country Status (1)

Country Link
JP (1) JPS5872588A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4965262A (en) * 1987-02-26 1990-10-23 Rohto Pharmaceutical Co., Ltd. Method for treating or preventing locally periodontal disease
US7189847B2 (en) * 1999-09-08 2007-03-13 Daiichi Pharmaceutical Co., Ltd. Process for producing benzoxazine derivative and production intermediate thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4965262A (en) * 1987-02-26 1990-10-23 Rohto Pharmaceutical Co., Ltd. Method for treating or preventing locally periodontal disease
US7189847B2 (en) * 1999-09-08 2007-03-13 Daiichi Pharmaceutical Co., Ltd. Process for producing benzoxazine derivative and production intermediate thereof

Also Published As

Publication number Publication date
JPS621953B2 (en) 1987-01-16

Similar Documents

Publication Publication Date Title
DK158267B (en) ANALOGY PROCEDURE FOR PREPARATION OF 9-HALOGEN-7-OXO-2,3-DIHYDRO-7H-PYRIDO (1,2,3-DE) (1,4) BENZOXAZINE-6-CARBOXYLIC ACID DERIVATIVES
JPH0148911B2 (en)
JPS6140264A (en) Novel heterocyclic derivatives, manufacture and manufacture of medicine particularly useful aldose reductase inhibitor
JPS5872588A (en) Production of pyrido(1,2,3-de)-1,4-benzoxazine derivative
Drummond et al. Alkaloids of the Australian Rutaceae: Acronychia baueri. III. The structure of acronycine
US2579420A (en) Method for producing 6-halo-8-hydroxycinchoninic acids
JPH027314B2 (en)
CA1203802A (en) Tricyclic compounds
JPH0116837B2 (en)
JPH0374671B2 (en)
JPS61246188A (en) Pyrido-1,4-benzoxazine derivative
Bruce et al. Pyridine Derivatives. II. Some 6-Methyl-4-hydroxy-2-pyridones and their Derivatives1, 2
JPS61246171A (en) Benzoxazine derivative
Papa et al. X-Ray Diagnostics. VI. Diiodohydroxydihydrostilbazoles and Related Compounds
JPH024222B2 (en)
JPH039095B2 (en)
JPS6256154B2 (en)
JPS5852290A (en) Pyridobenzoxazinecarboxylic acid derivative
JPH0317838B2 (en)
JPH0153861B2 (en)
JPH03170451A (en) Selective removal of chloride from chlorophthalic acid compound
US2302903A (en) Pyridine dicarboxylic acids
JPH0148910B2 (en)
JPS5862113A (en) Drug having activity against acid-fast germ
JPH02138268A (en) Benzoxazine compound

Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term