JPS61134378A - Production of pyrimidine derivative - Google Patents

Production of pyrimidine derivative

Info

Publication number
JPS61134378A
JPS61134378A JP25548784A JP25548784A JPS61134378A JP S61134378 A JPS61134378 A JP S61134378A JP 25548784 A JP25548784 A JP 25548784A JP 25548784 A JP25548784 A JP 25548784A JP S61134378 A JPS61134378 A JP S61134378A
Authority
JP
Japan
Prior art keywords
propanediimidate
formula
dimethyl
derivative
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.)
Expired - Lifetime
Application number
JP25548784A
Other languages
Japanese (ja)
Inventor
Fumio Suzuki
文夫 鈴木
Hiroshige Maruyama
丸山 寛茂
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.)
Nissan Chemical Corp
Original Assignee
Nissan Chemical Corp
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 Nissan Chemical Corp filed Critical Nissan Chemical Corp
Priority to JP25548784A priority Critical patent/JPS61134378A/en
Publication of JPS61134378A publication Critical patent/JPS61134378A/en
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To obtain a pyrimidine derivative useful as an intermediate for a herbicide by one process easily, by reacting dimethyl-1,3-propanediimidate with an alkoxycarbonyl isothiocyanate as raw materials. CONSTITUTION:A free dimethyl-1,3-propanediimidate shown by the formula I is reacted with an alkoxycarbonyl isothiocyanate shown by the formula II (R is alkyl) in an organic solvent such as toluene, etc. at -10 deg.C the reflux temperature of the solvent, and, if necessary, an equivalent amount of aqueous solution of alkali (bi)carbonate to suppress side reactions (yield is improved), to give a 2-alkoxycarbamoyl 4,6-dimethoxypyrimidine derivative shown by the formula III. This compound is recrystallized with hexane, etc., so that it is easily purified. Used as an intermediate for N-4,6- dimethoxypyrimidinesulfonylurea derivative as a herbicide.

Description

【発明の詳細な説明】 皮栗上旦肌里立国 本発明は2−アルコキシカルバモイル−4,6−シメト
キシピリミジン誘導体の製法に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing 2-alkoxycarbamoyl-4,6-cymethoxypyrimidine derivatives.

2−アルコキシカルバモイル−4,6−シメトキシピリ
ミジン誘導体は除草剤の中間体として有用である。例え
ば、特開昭58−131984号公報にN−4,6−シ
メトキシピリミジンスルホニルウレア誘導体の中間体と
しての使用例が記載されている。
2-Alkoxycarbamoyl-4,6-simethoxypyrimidine derivatives are useful as herbicide intermediates. For example, JP-A-58-131984 describes the use of N-4,6-cymethoxypyrimidine sulfonylurea derivatives as intermediates.

送mえ丘 N−4,6−シメトキシピリミジンスルホニルウレア誘
導体を得るには従来以下のような方法が知られている。
The following methods are conventionally known for obtaining N-4,6-cymethoxypyrimidine sulfonylurea derivatives.

(I)スルホニルイソシアナートまたはスルホニルカー
バメートと2−アミノ−4,6−シメトキシビリミジン
を反応させる反応式■の方法。
(I) A method according to Reaction Formula (1) in which sulfonyl isocyanate or sulfonyl carbamate is reacted with 2-amino-4,6-cymethoxypyrimidine.

〔式中Aは芳香環を、Alkはアルキル基を示す〕(2
)スルホンアミドと2−アルコキシカルバモイル−4,
6−シメトキシピリミジン誘導体を反応させる反応式■
の方法。
[In the formula, A represents an aromatic ring and Alk represents an alkyl group] (2
) sulfonamide and 2-alkoxycarbamoyl-4,
Reaction formula for reacting 6-cymethoxypyrimidine derivatives■
the method of.

〔式中人は芳香環を、Alkはアルキル基を、Rはアルキル基を示す、〕[In the formula, the person represents an aromatic ring, Alk represents an alkyl group, and R represents an alkyl group.]

反応式■の方法の原料であるスルホニルイソシアナート
またはスルホニルカーバメートは対応する反応式■で用
いられるスルホンアミドより合成される。
Sulfonyl isocyanate or sulfonyl carbamate, which is a raw material in the method of reaction formula (2), is synthesized from the sulfonamide used in the corresponding reaction formula (2).

また、反応式■の方法の原料である2−アルコキシカル
バモイル−4,6−シメトキシピリミジン誘導体は反応
式Iで用いられる2−アミノ−4゜6−シメトキシピリ
ミジンをアルコキシカルボニル化することによって得ら
れていた。
In addition, the 2-alkoxycarbamoyl-4,6-simethoxypyrimidine derivative, which is a raw material in the method of Reaction Formula (1), can be obtained by alkoxycarbonylating 2-amino-4°6-simethoxypyrimidine used in Reaction Formula I. It was getting worse.

従って、目的とするN−4,6−シメトキシピリミシン
スルホニルウレア誘導体を得るための工程数としてはい
ずれも変わりはなかった。
Therefore, there was no difference in the number of steps to obtain the desired N-4,6-simethoxypyrimicine sulfonylurea derivative.

また、いずれの方法にとっても必要である2−アミノ−
4,6−シメトキシピリミジンは以下の方法によって合
成された。
In addition, 2-amino-
4,6-Simethoxypyrimidine was synthesized by the following method.

従来の方法によればいずれも目的とする除草剤を製造す
るためには多段階の反応工程を必要とし、かならずしも
工業的に有利とはいえなかった。
All conventional methods require multi-step reaction steps in order to produce the desired herbicide, and are not necessarily industrially advantageous.

μ 占を”るための   び  の1 2−アルコキシカルバモイル−4,6−シメトキシビリ
ミジン誘導体を2−アミノ−4,6−シメトキシピリミ
ジンを経ることなく一工程で合成する方法を見出し、ス
ルホンアミドと直接反応させることでN−4,6−シメ
トキシピリミジンスルホニルウレア誘導体を短工程で得
る前記の反応式■で示した方法を工業的に実用可能な工
程とすることができた。
We discovered a method to synthesize 2-alkoxycarbamoyl-4,6-simethoxypyrimidine derivatives in one step without going through 2-amino-4,6-simethoxypyrimidine, and used sulfone The method shown in the above reaction formula (1), in which an N-4,6-cymethoxypyrimidine sulfonylurea derivative is obtained in a short process by direct reaction with an amide, could be made into an industrially practical process.

即ち、ジメチル−1,3−プロパンジイミデートとアル
コキシカルボニルイソチオシアネートを反応させること
で2−アルコキシカルバモイル−4゜6−シメトキシビ
リミジン誘導体を一工程で得られることを見出し、本発
明を完成した。
That is, they discovered that a 2-alkoxycarbamoyl-4゜6-cymethoxypyrimidine derivative could be obtained in one step by reacting dimethyl-1,3-propanediimidate with alkoxycarbonyl isothiocyanate, and completed the present invention. did.

〔式中、Rはアルキル基を示す。〕[In the formula, R represents an alkyl group. ]

ここで原料のジメチル−1,3−プロパンジイミデート
は(Journal of A+werican Ch
ea+1cal 5ociety7140、1949)
に記載された方法に従ってマロンニトリル、塩酸、メタ
ノールから高牧率で容易にその塩酸塩を得ることができ
る。この塩酸塩は有機溶媒に不溶で酸性条件下では水に
対して不安定な化合物である。
Here, the raw material dimethyl-1,3-propanediimidate is (Journal of A+werican Ch
ea+1cal 5ociety7140, 1949)
The hydrochloride salt can be easily obtained at high yield from malonitrile, hydrochloric acid, and methanol according to the method described in . This hydrochloride is a compound that is insoluble in organic solvents and unstable in water under acidic conditions.

反応に際しては遊離のジメチル−1,3−プロパンジイ
ミデートを特開昭56−29557号公報に記載された
方法に従って単離し反応に用いても或いは反応系中でア
ルカリ性化合物を用いて遊離のジメチル−1,3−プロ
パンジイミデートを直接生成させ単離することな(その
まま反応に用い ′てもよい。
In the reaction, free dimethyl-1,3-propanediimidate can be isolated and used in the reaction according to the method described in JP-A-56-29557, or free dimethyl-1,3-propanediimidate can be isolated using an alkaline compound in the reaction system. -1,3-propanediimidate is not directly produced and isolated (it may be used as it is in the reaction).

また一方の原料であるアルコキシカルボニルイソチオシ
アネートも強いアルカリ性或いは酸性条件下で水に対し
て不安定な化合物である。
Also, one of the raw materials, alkoxycarbonyl isothiocyanate, is a compound that is unstable with respect to water under strongly alkaline or acidic conditions.

単離した遊離のジメチル−1,3−プロパンジイミデー
トを反応に用いる場合は、これを有機溶媒に溶解させ一
り0℃〜溶媒の還流温度の範囲でアルコキシカルポニル
イソチオシアネートを加えることにより容易に2−アル
コキシカルバモイル−4゜6−シメトキシピリミジン誘
導体を一工程で得ることができる。
When using isolated free dimethyl-1,3-propanediimidate in a reaction, it can be easily reacted by dissolving it in an organic solvent and adding alkoxycarponyl isothiocyanate at a temperature ranging from 0°C to the reflux temperature of the solvent. A 2-alkoxycarbamoyl-4°6-cymethoxypyrimidine derivative can be obtained in one step.

ここで用いることができる溶媒としてはベンゼン、トル
エン等の芳香族化合物、酢酸エチル等のエステル化合物
、テトラヒドロフラン、エチルエーテル等のエーテル化
合物、塩化メチレン等の塩素化炭化水素化合物、アセト
ン、メチルエチルケトン等のケトン化合物、アセトニト
リル等のニトリル化合物があげられる。
Solvents that can be used here include aromatic compounds such as benzene and toluene, ester compounds such as ethyl acetate, ether compounds such as tetrahydrofuran and ethyl ether, chlorinated hydrocarbon compounds such as methylene chloride, and ketones such as acetone and methyl ethyl ketone. and nitrile compounds such as acetonitrile.

また、当量のアルカリ炭酸塩、アルカリ重炭酸塩の水溶
液を加えることにより副反応を抑制し収率を向上できる
。得られた目的の2−アルコキシカルバモイル−4,6
−シメトキシピリミジン誘導体はヘキサン等で再結晶す
ることで容易に精製することができる。
Further, by adding an equivalent amount of an aqueous solution of alkali carbonate or alkali bicarbonate, side reactions can be suppressed and the yield can be improved. The desired 2-alkoxycarbamoyl-4,6 obtained
-Simethoxypyrimidine derivatives can be easily purified by recrystallization with hexane or the like.

遊離のジメチル−1,3−プロパンジイミデートを反応
系内で直接生成させ、単離することなくそのまま反応に
用いる場合は、反応系を酸性にしたり、極端な塩基性に
することのないように注意することが必要である。。
When free dimethyl-1,3-propane diimidate is directly generated in the reaction system and used in the reaction without isolation, care must be taken not to make the reaction system acidic or extremely basic. It is necessary to pay attention to .

実施態様の一例を示すと、ジメチル−1,3−プロパン
ジイミデート塩酸塩を2〜3倍モルのカリウム、ナトリ
ウム等の炭酸塩水溶液及び有機溶媒共存の溶液に一1θ
〜20℃で加える。ここでジメチル−1,3−プロパン
ジイミデートを遊離させるために用いるアルカリとして
、炭酸塩の一部を苛性アルカリに置き換えることも可能
であるがこの場合炭酸基金てを苛性アルカリに置き換え
ると系内の塩基性が強くなりすぎ好ましくない。また、
ジメチル−1,3−プロパンジイミデートを遊離させる
ための塩基として、重炭酸塩はその塩基性が充分ではな
い。
As an example of an embodiment, dimethyl-1,3-propanediimidate hydrochloride is added to a solution containing 2 to 3 times the mole of a carbonate solution such as potassium or sodium and an organic solvent at 1θ.
Add at ~20°C. It is also possible to replace part of the carbonate with caustic alkali as the alkali used to liberate dimethyl-1,3-propanediimidate, but in this case, if the entire carbonate is replaced with caustic alkali, the system The basicity becomes too strong, which is undesirable. Also,
As a base for liberating dimethyl-1,3-propanediimidate, bicarbonate is not basic enough.

上記のようにして調製した反応系内に先と同様アルコキ
シカルボニルインチオシアネートを加えることにより容
易に2−アルコキシカルバモイル−4,6−シメトキシ
ビリミジン誘導体を得ることができる。
A 2-alkoxycarbamoyl-4,6-simethoxypyrimidine derivative can be easily obtained by adding alkoxycarbonyl inthiocyanate to the reaction system prepared as described above.

遺」1阻 以下に本発明の具体的実施例を示すが、本発明の要旨を
越えない限り本発明は以下の実施例に限定されるもので
はない。
Specific examples of the present invention are shown below, but the present invention is not limited to the following examples unless the gist of the present invention is exceeded.

xJLf随1 トルエン30m lにあらかじめ調製したジメチル−1
゜3−プロパンジイミデート2.60g(0,02モル
)を溶解し、エトキシカルボニルイソチオシアネート2
、52g (0,02モル)をトルエン5i1で希釈し
た溶液を50℃で30分かけて滴下した。
xJLf 1 Dimethyl-1 prepared in advance in 30 ml of toluene
゜Dissolve 2.60 g (0.02 mol) of 3-propanediimidate, and dissolve 2.60 g (0.02 mol) of ethoxycarbonyl isothiocyanate.
, 52 g (0.02 mol) diluted with toluene 5i1 was added dropwise at 50° C. over 30 minutes.

更に30分攪拌し反応を完結させた後冷却した。不溶物
を濾去しN−水酸化ナトリウム水溶液10m1で2回洗
浄し、水10m1で3回洗浄した。
After stirring for an additional 30 minutes to complete the reaction, the mixture was cooled. Insoluble matters were removed by filtration and washed twice with 10 ml of N-sodium hydroxide aqueous solution and three times with 10 ml of water.

トルエン層を減圧濃縮し、黄色油状物1t2.35gを
得た。放置するとしばらくして黄色固体になった。
The toluene layer was concentrated under reduced pressure to obtain 1t2.35g of a yellow oil. When left for a while, it turned into a yellow solid.

ガスクロマトグラフィーで純度分析したところ純度90
%であり枚重45%であった。
Purity analysis by gas chromatography showed purity of 90.
%, and the sheet weight was 45%.

これをn−ヘキサンよ、り再結晶し融点62〜64℃の
白色結晶を得た。n m rで分析し目的物であること
を確認した。
This was recrystallized from n-hexane to obtain white crystals with a melting point of 62-64°C. It was confirmed to be the desired product by nmr analysis.

1.30ppm   311.  t 3.909pM   6H,S 4.25ppm   2H+  q 5.75ppm   IH,s 7.80pp+*   Ill、  s叉豊豆l あらかじめ調製したジメチル−1,3−プロパンジイミ
デート2.60g(0,02モル)を塩化メチレン30
m1に溶解し、これに35%炭酸カリウム水溶液を5m
l加え攪拌した。エトキシカルボニルイソチオシアネー
ト3.96g(0,03モル)を塩化メチレン5n+1
に希釈した溶液を15〜20℃で40分かけて滴下した
1.30ppm 311. t 3.909pM 6H,S 4.25ppm 2H+ q 5.75ppm IH,s 7.80pp+* Ill, s 叉 ふょう l 2.60 g (0.02 mol) of dimethyl-1,3-propanediimidate prepared in advance ) to methylene chloride 30
ml, and add 5ml of 35% potassium carbonate aqueous solution to this.
1 was added and stirred. 3.96 g (0.03 mol) of ethoxycarbonyl isothiocyanate was added to 5n+1 methylene chloride.
A diluted solution was added dropwise at 15 to 20°C over 40 minutes.

30分15〜20℃で攪拌した後1時間加熱還流した。After stirring for 30 minutes at 15-20°C, the mixture was heated under reflux for 1 hour.

水20m1を加え不溶物を濾去し分液した。塩化メチレ
ン層を実施例1と同様に処理することにより淡黄色油状
物質3.17gを得た。放置するとしばら(して淡黄色
固体になった。
20 ml of water was added, and insoluble materials were removed by filtration to separate the layers. The methylene chloride layer was treated in the same manner as in Example 1 to obtain 3.17 g of a pale yellow oily substance. When left for a while, it turned into a pale yellow solid.

ガスクロマトグラフィーで純度分析したところ純度91
%でありジメチル−1,3−プロパンジイミデートに対
して収率63%であった。
Purity analysis by gas chromatography showed purity of 91.
%, and the yield was 63% based on dimethyl-1,3-propanediimidate.

実m 水1.5gに炭酸カリウム8.28g(0,06モル)
を溶解させ、酢酸エチル30m lを加えて5℃以下に
冷却した。
8.28 g (0.06 mol) of potassium carbonate in 1.5 g of water
was dissolved, 30 ml of ethyl acetate was added, and the mixture was cooled to below 5°C.

これにジメチル−1,3−プロパンジイミデート塩酸塩
15 g (0,02モル)を徐々に加えた。
To this was gradually added 15 g (0.02 mol) of dimethyl-1,3-propanediimidate hydrochloride.

15℃に反応温度をあげエトキシカルボニルイソチオシ
アネート3.96g(0,03モル)を酢酸エチル5m
lに希釈した溶液を40分かけて滴下した。更に20分
間15〜20℃で反応させた後40℃で1時間反応させ
た。
The reaction temperature was raised to 15°C, and 3.96 g (0.03 mol) of ethoxycarbonyl isothiocyanate was added to 5 m of ethyl acetate.
A solution diluted to 1 liter was added dropwise over 40 minutes. The reaction was further continued at 15 to 20°C for 20 minutes, and then at 40°C for 1 hour.

冷却後水20++1を加え不溶物を濾去し分液した。酢
酸エチル層をN−水酸化ナトリウム水溶液10m1で2
回洗浄し、水1抛lで3回洗浄した。
After cooling, 20++1 liters of water was added, insoluble materials were removed by filtration, and the mixture was separated. The ethyl acetate layer was diluted with 10 ml of N-sodium hydroxide aqueous solution.
It was washed twice and washed three times with 1 liter of water.

酢酸エチル層を減圧濃縮し、淡黄色油状物質2.76g
を得た。放置するとしばらくして淡黄色固体になった。
The ethyl acetate layer was concentrated under reduced pressure to obtain 2.76 g of pale yellow oil.
I got it. After a while, it turned into a pale yellow solid.

ガスクロマトグラフィーで純度分析したところ純度85
%であり枚重51%であった。
Purity analysis by gas chromatography showed that the purity was 85.
%, and the sheet weight was 51%.

Claims (1)

【特許請求の範囲】 ジメチル−1,3−プロパンジイミデートとアルコキシ
カルボニルイソチオシアネートを反応させることを特徴
とする一般式( I ) ▲数式、化学式、表等があります▼( I ) 〔式中Rはアルキル基を示す。〕 で表されるピリミジン誘導体の製法。
[Claims] General formula (I) characterized by reacting dimethyl-1,3-propanediimidate and alkoxycarbonyl isothiocyanate ▲There are numerical formulas, chemical formulas, tables, etc.▼ (I) [In the formula R represents an alkyl group. ] A method for producing a pyrimidine derivative represented by
JP25548784A 1984-12-03 1984-12-03 Production of pyrimidine derivative Expired - Lifetime JPS61134378A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25548784A JPS61134378A (en) 1984-12-03 1984-12-03 Production of pyrimidine derivative

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25548784A JPS61134378A (en) 1984-12-03 1984-12-03 Production of pyrimidine derivative

Publications (1)

Publication Number Publication Date
JPS61134378A true JPS61134378A (en) 1986-06-21

Family

ID=17279438

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25548784A Expired - Lifetime JPS61134378A (en) 1984-12-03 1984-12-03 Production of pyrimidine derivative

Country Status (1)

Country Link
JP (1) JPS61134378A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0279366A2 (en) * 1987-02-18 1988-08-24 Hoechst Aktiengesellschaft Process for the preparation of pyrimidines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0279366A2 (en) * 1987-02-18 1988-08-24 Hoechst Aktiengesellschaft Process for the preparation of pyrimidines
US4960887A (en) * 1987-02-18 1990-10-02 Hoechst Aktiengesellschaft Process for the preparation of pyrimidines
EP0279366B1 (en) * 1987-02-18 1992-08-12 Hoechst Aktiengesellschaft Process for the preparation of pyrimidines

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EXPY Cancellation because of completion of term