JP4711494B2 - Method for producing thiobenzamides - Google Patents

Method for producing thiobenzamides Download PDF

Info

Publication number
JP4711494B2
JP4711494B2 JP2000242240A JP2000242240A JP4711494B2 JP 4711494 B2 JP4711494 B2 JP 4711494B2 JP 2000242240 A JP2000242240 A JP 2000242240A JP 2000242240 A JP2000242240 A JP 2000242240A JP 4711494 B2 JP4711494 B2 JP 4711494B2
Authority
JP
Japan
Prior art keywords
group
mol
reaction
producing
benzonitrile
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
JP2000242240A
Other languages
Japanese (ja)
Other versions
JP2002053546A (en
Inventor
徳之 林坂
幸生 飯田
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.)
Sumitomo Seika Chemicals Co Ltd
Original Assignee
Sumitomo Seika Chemicals 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 Sumitomo Seika Chemicals Co Ltd filed Critical Sumitomo Seika Chemicals Co Ltd
Priority to JP2000242240A priority Critical patent/JP4711494B2/en
Publication of JP2002053546A publication Critical patent/JP2002053546A/en
Application granted granted Critical
Publication of JP4711494B2 publication Critical patent/JP4711494B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Description

【0001】
【産業上の利用分野】
本発明は、チオベンズアミド類の製造方法に関する。さらに詳しくは、医薬品、農薬等の製造中間体として有用なチオベンズアミド類の製造方法に関する。
【0002】
【従来の技術】
チオベンズアミド類を製造する方法としては、4−ヒドロキシベンゾニトリルと硫化水素とを反応させる方法(J.Am.Chem.Soc.94;9,3153,(1972))、ベンゾニトリル類と五硫化リンとを反応させる方法(新実験化学講座14有機合成と反応[III]p1828〜1829)、ベンゾニトリル類とチオアセトアミドとをポリリン酸中で反応させる方法(特開平11−60552号公報)等が知られている。
【0003】
しかしながら、前記の4−ヒドロキシベンゾニトリルと硫化水素とを反応させる方法においては、触媒であるトリエチルアミンを4−ヒドロキシベンゾニトリルに対して53モル%と大量に用いている。また、ベンゾニトリル類と五硫化リンとを反応させる方法やベンゾニトリル類とチオアセトアミドとをポリリン酸中で反応させる方法は、リンを大量に含む廃水が排出されるため、高度な処理が必要となる。したがって、これらの方法は、工業的に有利な製造方法とは言い難い。
【0004】
【発明が解決しようとする課題】
本発明は、工業的に有利なチオベンズアミド類の製造方法を提供することを目的とする。
【0005】
【課題を解決するための手段】
本発明者らは、前記課題を解決すべく鋭意検討の結果、ベンゾニトリル類と硫化水素とを、加圧下で反応させることにより、触媒の使用量が低減でき、工業的に有利にチオベンズアミド類を製造することができることを見出し本発明を完成した。
【0006】
すなわち、本発明は、下記一般式(1);
【0007】
【化3】

Figure 0004711494
(式中、R1、R2、R3は、それぞれ独立して、水素原子、ハロゲン原子、水酸基、炭素数1〜4のアルキル基、炭素数1〜4のアルコキシ基または炭素数1〜4のアルキルチオ基を表す。)
【0008】
で表されるベンゾニトリル類と硫化水素とを、触媒の存在下に加圧下で反応させることを特徴とする下記一般式(2);
【0009】
【化4】
Figure 0004711494
(式中、R1、R2、R3は、前記一般式(1)と同様である。)
【0010】
で表されるチオベンズアミド類の製造方法に関する。
【0011】
【発明の実施の形態】
本発明においては、ベンゾニトリル類と硫化水素とを、触媒の存在下に加圧下で反応させることにより、触媒の使用量が低減でき、工業的に有利にチオベンズアミド類を製造することができる。
【0012】
本発明に用いられるベンゾニトリル類は、下記一般式(1);
【0013】
【化5】
Figure 0004711494
【0014】
で表される化合物である。
【0015】
前記一般式(1)中、R1、R2、R3は、それぞれ独立して、水素原子、ハロゲン原子、水酸基、炭素数1〜4のアルキル基、炭素数1〜4のアルコキシ基または炭素数1〜4のアルキルチオ基を表す。
【0016】
前記ハロゲン原子としては、フッ素原子、塩素原子、臭素原子、ヨウ素原子等が挙げられる。
【0017】
前記炭素数1〜4のアルキル基としては、メチル基、エチル基、n−プロピル基、イソプロピル基、n−ブチル基、イソブチル基、sec−ブチル基、tert−ブチル基等が挙げられる。
【0018】
前記炭素数1〜4のアルコキシ基としては、メトキシ基、エトキシ基、n−プロポキシ基、イソプロポキシ基、n−ブトキシ基、イソブトキシ基、sec−ブトキシ基、tert−ブトキシ基等が挙げられる。
【0019】
前記炭素数1〜4のアルキルチオ基としては、メチルチオ基、エチルチオ基、n−プロピルチオ基、イソプロピルチオ基、n−ブチルチオ基、イソブチルチオ基、sec−ブチルチオ基、tert−ブチルチオ基等が挙げられる。
【0020】
前記ベンゾニトリル類の具体例としては、ベンゾニトリル、4−クロロベンゾニトリル、2−ブロモベンゾニトリル、4−シアノフェノール、3−メチルベンゾニトリル、4−エチルベンゾニトリル、4−n−プロピルベンゾニトリル、4−n−ブチルベンゾニトリル、4−tert−ブチルベンゾニトリル、4−メトキシベンゾニトリル、4−エトキシベンゾニトリル、4−n−プロポキシベンゾニトリル、4−n−ブトキシベンゾニトリル、4−tert−ブトキシベンゾニトリル、2−メチル−4−ブロモベンゾニトリル、2−メトキシ−4−ヒドロキシベンゾニトリル、2−エチル−4−メトキシベンゾニトリル、2−n−プロポキシ−4−クロロベンゾニトリル、2−n−プロピル−4−ニトロベンゾニトリル、2−メチルチオ−4−クロロベンゾニトリル、2−メチル−4−ブロモ−6−ヒドロキシベンゾニトリル、2−メトキシ−4−ヒドロキシ−6−ニトロベンゾニトリル、2−n−プロピル−4−ニトロ−6−メトキシベンゾニトリル、2−メチルチオ−4−クロロ−6−ヒドロキシベンゾニトリル、2−n−プロポキシ−4−クロロ−6−ブロモベンゾニトリル等が挙げられる。中でも、ベンゾニトリル、4−クロロベンゾニトリル、4−シアノフェノール、4−メトキシベンゾニトリルが好適に用いられる。
【0021】
本発明に用いられる硫化水素の使用量は、通常、ベンゾニトリル類に対して1〜2倍モル、好ましくは1.1〜1.4倍モルである。硫化水素の使用量が1倍モル未満の場合、反応が完結しにくい。また、硫化水素の使用量が2倍モルを越える場合、未反応の硫化水素が多くなり好ましくない。
【0022】
本発明に用いられる触媒は、特に限定されず、例えば、ジメチルアミン、ジエチルアミン、トリメチルアミン、トリエチルアミン等のアルキルアミン類;ピリジン、メチルピリジン、エチルピリジン等のピリジン類が挙げられる。中でも、入手が容易で経済的な観点から、ジエチルアミン、トリメチルアミン、トリエチルアミンが好適に用いられる。
【0023】
前記触媒の使用量は、通常、ベンゾニトリル類に対して0.1〜20モル%、好ましくは1.0〜10モル%である。触媒の使用量が0.1モル%未満の場合、反応速度が遅くなるおそれがある。また、触媒の使用量が20モル%を越える場合、使用量に見合う効果がなく経済的でない
【0024】
前記反応における圧力は、通常、1068.9kPa以下、好ましくは294.2〜980.6kPa、より好ましくは490.3〜980.6kPaの範囲である。前記反応における圧力が1068.9kPaを超えても、特に有利な結果を得ることができず、経済的でない。
【0025】
前記反応における反応温度は、通常、40〜160℃、好ましくは60〜110℃である。反応温度が40℃未満の場合、反応速度が遅くなるおそれがある。また、反応温度が160℃を越える場合、不純物の生成が多くなり好ましくない。反応時間は、反応温度により異なるが、通常、3〜20時間である。
【0026】
前記反応に用いられる溶媒としては、特に限定されず、例えば、ベンゼン、トルエン、キシレン、モノクロロベンゼン、o−ジクロロベンゼン、クロロホルム、二塩化エチレン、ジエチルエーテル等の非水溶性有機溶媒;ジオキサン、テトラヒドロフラン、アセトン、ジメチルホルムアミド、ジメチルスルホキシド、エチルアルコール、メチルアルコール等の水溶性有機溶媒等が挙げられる。中でも、反応後に触媒、溶媒等の回収を容易に行うことができる観点から、トルエン、メチルアルコール、エチルアルコールが好適に用いられる。
【0027】
前記反応溶媒の使用量は、通常、ベンゾニトリル類に対して2〜10倍重量である。反応溶媒の使用量が2倍重量未満の場合、反応が円滑に進行しにくくなるおそれがある。また、反応溶媒の使用量が10倍重量を超える場合、容積効率が悪化するばかりか、収率が低下するおそれがある。
【0028】
反応終了後、放圧して反応系内から過剰の硫化水素を除去し、次いで、反応液を冷却することによりチオベンズアミド類が析出する。析出したチオベンズアミド類は濾過等の方法により容易に単離することができる。
【0029】
かくして得られたチオベンズアミド類は下記一般式(2);
【0030】
【化6】
Figure 0004711494
【0031】
で表される化合物である。
【0032】
前記一般式(2)中、R1、R2、R3は、それぞれ独立して、前記一般式(1)と同様に水素原子、ハロゲン原子、水酸基、ニトロ基、炭素数1〜4のアルキル基、炭素数1〜4のアルコキシ基または炭素数1〜4のアルキルチオ基を表す。
【0033】
前記チオベンズアミド類の具体例としては、チオベンズアミド、4−クロロチオベンズアミド、2−ブロモチオベンズアミド、4−ヒドロキシチオベンズアミド、3−メチルチオベンズアミド、4−エチルチオベンズアミド、4−n−プロピルチオベンズアミド、4−n−ブチルチオベンズアミド、4−tert−ブチルチオベンズアミド、4−メトキシチオベンズアミド、4−エトキシチオベンズアミド、4−n−プロポキシチオベンズアミド、4−n−ブトキシチオベンズアミド、4−tert−ブトキシチオベンズアミド、2−メチル−4−ブロモチオベンズアミド、2−メトキシ−4−ヒドロキシチオベンズアミド、2−エチル−4−メトキシチオベンズアミド、2−n−プロポキシ−4−クロロチオベンズアミド、2−n−プロピル−4−ニトロチオベンズアミド、2−メチルチオ−4−クロロチオベンズアミド、2−メチル−4−ブロモ−6−ヒドロキシチオベンズアミド、2−メトキシ−4−ヒドロキシ−6−ニトロチオベンズアミド、2−n−プロピル−4−ニトロ−6−メトキシチオベンズアミド、2−メチルチオ−4−クロロ−6−ヒドロキシチオベンズアミド、2−n−プロポキシ−4−クロロ−6−ブロモチオベンズアミド等が挙げられる。
【0034】
【実施例】
以下、実施例、比較例により本発明をさらに詳しく説明するが、本発明はこれら実施例のみに限定されるものではない。
【0035】
実施例1
撹拌機、温度計およびガス吹き込み管を備えた1L容の耐圧反応容器に、ベンゾニトリル51.6g(0.5モル)、ジエチルアミン3.3g(0.045モル)、トルエン200gを仕込み、100℃で6時間を要して硫化水素22g(0.6モル)を吹き込み反応させた。その時の圧力は、784.5〜980.6kPaであった。反応終了後、放圧して反応系内から過剰の硫化水素を除去した。次いで、反応液を5℃まで冷却し、析出した結晶を濾取した。得られた結晶をトルエン100gで洗浄後、乾燥し、チオベンズアミド56.3g(0.41モル)を得た。ベンゾニトリルに対する収率は82%であった。
【0036】
実施例2
実施例1においてベンゾニトリル51.6g(0.5モル)の代わりに4−メトキシベンゾニトリル66.6g(0.5モル)を、ジエチルアミン3.3g(0.045モル)の代わりにトリメチルアミン2.1g(0.035モル)を用いた以外は実施例1と同様にして、4−メトキシチオベンズアミド66.9g(0.4モル)を得た。4−メトキシベンゾニトリルに対する収率は80%であった。
【0037】
実施例3
実施例1においてベンゾニトリル51.6g(0.5モル)の代わりに4−クロロベンゾニトリル68.8g(0.5モル)を、ジエチルアミン3.3g(0.045モル)の代わりにトリエチルアミン2.5g(0.025モル)用いた以外は実施例1と同様にして、4−クロロチオベンズアミド65.2g(0.38モル)を得た。4−クロロベンゾニトリルに対する収率は76%であった。
【0038】
実施例4
実施例1においてベンゾニトリル51.6g(0.5モル)の代わりに4−シアノフェノール59.6g(0.5モル)を用いた以外は実施例1と同様にして、4−ヒドロキシチオベンズアミド64.3g(0.42モル)を得た。4−シアノフェノールに対する収率は84%であった。
【0039】
実施例5
実施例1においてベンゾニトリル51.6g(0.5モル)の代わりに2−メチル−4−ブロモベンゾニトリル98.0g(0.5モル)を用いた以外は実施例1と同様にして、2−メチル−4−ブロモチオベンズアミド89.7g(0.39モル)を得た。2−メチル−4−ブロモベンゾニトリルに対する収率は78%であった。
【0040】
実施例6
実施例1においてベンゾニトリル51.6g(0.5モル)の代わりに2−メチル−4−ブロモ−6−ヒドロキシベンゾニトリル106.0g(0.5モル)を用いた以外は実施例1と同様にして、2−メチル−4−ブロモ−6−ヒドロキシチオベンズアミド123.1g(0.4モル)を得た。2−メチル−4−ブロモ−6−ヒドロキシベンゾニトリルに対する収率は80%であった。
【0041】
比較例1
撹拌機、温度計およびガス吹き込み管を備えた1L容の反応器に、ベンゾニトリル51.6g(0.5モル)、ジエチルアミン3.3g(0.045モル)、トルエン200gを仕込み、100℃、常圧の条件下で12時間を要して硫化水素22g(0.6モル)を吹き込み反応させた。反応終了後、反応液を5℃まで冷却し、析出した結晶を濾取した。得られた結晶をトルエン100gで洗浄後、乾燥し、チオベンズアミド13.7g(0.1モル)を得た。ベンゾニトリルに対する収率は20%であった。
【0042】
【発明の効果】
本発明によると、ベンゾニトリル類と硫化水素とを、触媒の存在下に加圧下で反応させることにより、触媒の使用量が低減でき、工業的に有利にチオベンズアミド類を製造することができる。[0001]
[Industrial application fields]
The present invention relates to a method for producing thiobenzamides. More specifically, the present invention relates to a method for producing thiobenzamides that are useful as intermediates for producing pharmaceuticals, agricultural chemicals, and the like.
[0002]
[Prior art]
As a method for producing thiobenzamides, a method in which 4-hydroxybenzonitrile and hydrogen sulfide are reacted (J. Am. Chem. Soc. 94; 9,3153, (1972)), benzonitriles and phosphorus pentasulfide are reacted. (New Experimental Chemistry Lecture 14 Organic Synthesis and Reaction [III] p1828-1829), a method of reacting benzonitriles with thioacetamide in polyphosphoric acid (Japanese Patent Laid-Open No. 11-60552), etc. are known. It has been.
[0003]
However, in the method of reacting 4-hydroxybenzonitrile and hydrogen sulfide, triethylamine as a catalyst is used in a large amount of 53 mol% with respect to 4-hydroxybenzonitrile. In addition, the method of reacting benzonitriles with phosphorus pentasulfide or the method of reacting benzonitriles with thioacetamide in polyphosphoric acid requires wastewater containing a large amount of phosphorus, and therefore requires advanced treatment. Become. Therefore, these methods are hardly industrially advantageous production methods.
[0004]
[Problems to be solved by the invention]
An object of this invention is to provide the manufacturing method of industrially advantageous thiobenzamide.
[0005]
[Means for Solving the Problems]
As a result of intensive studies to solve the above problems, the present inventors have made it possible to reduce the amount of catalyst used by reacting benzonitriles and hydrogen sulfide under pressure, and industrially advantageous thiobenzamides. The present invention was completed.
[0006]
That is, the present invention provides the following general formula (1);
[0007]
[Chemical 3]
Figure 0004711494
(In the formula, R 1 , R 2 and R 3 are each independently a hydrogen atom, a halogen atom, a hydroxyl group, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkyl group having 1 to 4 carbon atoms. Represents an alkylthio group of
[0008]
The following general formula (2), characterized in that a benzonitrile represented by the formula and hydrogen sulfide are reacted under pressure in the presence of a catalyst;
[0009]
[Formula 4]
Figure 0004711494
(In the formula, R 1 , R 2 and R 3 are the same as those in the general formula (1).)
[0010]
It relates to a method for producing thiobenzamides represented by
[0011]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, by reacting benzonitriles and hydrogen sulfide under pressure in the presence of a catalyst, the amount of the catalyst used can be reduced, and thiobenzamides can be produced industrially advantageously.
[0012]
The benzonitriles used in the present invention are represented by the following general formula (1);
[0013]
[Chemical formula 5]
Figure 0004711494
[0014]
It is a compound represented by these.
[0015]
In the general formula (1), R 1 , R 2 and R 3 are each independently a hydrogen atom, a halogen atom, a hydroxyl group, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms or carbon. The alkylthio group of number 1-4 is represented.
[0016]
Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
[0017]
Examples of the alkyl group having 1 to 4 carbon atoms include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, and tert-butyl group.
[0018]
Examples of the alkoxy group having 1 to 4 carbon atoms include a methoxy group, an ethoxy group, an n-propoxy group, an isopropoxy group, an n-butoxy group, an isobutoxy group, a sec-butoxy group, and a tert-butoxy group.
[0019]
Examples of the alkylthio group having 1 to 4 carbon atoms include a methylthio group, an ethylthio group, an n-propylthio group, an isopropylthio group, an n-butylthio group, an isobutylthio group, a sec-butylthio group, and a tert-butylthio group.
[0020]
Specific examples of the benzonitriles include benzonitrile, 4-chlorobenzonitrile, 2-bromobenzonitrile, 4-cyanophenol, 3-methylbenzonitrile, 4-ethylbenzonitrile, 4-n-propylbenzonitrile, 4-n-butylbenzonitrile, 4-tert-butylbenzonitrile, 4-methoxybenzonitrile, 4-ethoxybenzonitrile, 4-n-propoxybenzonitrile, 4-n-butoxybenzonitrile, 4-tert-butoxybenzo Nitrile, 2-methyl-4-bromobenzonitrile, 2-methoxy-4-hydroxybenzonitrile, 2-ethyl-4-methoxybenzonitrile, 2-n-propoxy-4-chlorobenzonitrile, 2-n-propyl- 4-nitrobenzonitrile, 2-methylthio- -Chlorobenzonitrile, 2-methyl-4-bromo-6-hydroxybenzonitrile, 2-methoxy-4-hydroxy-6-nitrobenzonitrile, 2-n-propyl-4-nitro-6-methoxybenzonitrile, 2 -Methylthio-4-chloro-6-hydroxybenzonitrile, 2-n-propoxy-4-chloro-6-bromobenzonitrile and the like. Among these, benzonitrile, 4-chlorobenzonitrile, 4-cyanophenol, and 4-methoxybenzonitrile are preferably used.
[0021]
The usage-amount of the hydrogen sulfide used for this invention is 1-2 times mole normally with respect to benzonitriles, Preferably it is 1.1-1.4 times mole. When the amount of hydrogen sulfide used is less than 1 mol, the reaction is difficult to complete. Moreover, when the usage-amount of hydrogen sulfide exceeds 2 times mole, unreacted hydrogen sulfide increases and it is not preferable.
[0022]
The catalyst used in the present invention is not particularly limited, and examples thereof include alkylamines such as dimethylamine, diethylamine, trimethylamine, and triethylamine; pyridines such as pyridine, methylpyridine, and ethylpyridine. Among these, diethylamine, trimethylamine, and triethylamine are preferably used from the viewpoint of easy availability and economical.
[0023]
The usage-amount of the said catalyst is 0.1-20 mol% normally with respect to benzonitrile, Preferably it is 1.0-10 mol%. When the usage-amount of a catalyst is less than 0.1 mol%, there exists a possibility that reaction rate may become slow. On the other hand, when the amount of the catalyst used exceeds 20 mol%, there is no effect corresponding to the amount used and it is not economical.
The pressure in the reaction is usually 1068.9 kPa or less, preferably 294.2 to 980.6 kPa, more preferably 490.3 to 980.6 kPa. Even if the pressure in the reaction exceeds 1068.9 kPa, particularly advantageous results cannot be obtained and it is not economical.
[0025]
The reaction temperature in the reaction is usually 40 to 160 ° C, preferably 60 to 110 ° C. When reaction temperature is less than 40 degreeC, there exists a possibility that reaction rate may become slow. On the other hand, when the reaction temperature exceeds 160 ° C., the generation of impurities increases, which is not preferable. The reaction time varies depending on the reaction temperature, but is usually 3 to 20 hours.
[0026]
The solvent used in the reaction is not particularly limited, and examples thereof include water-insoluble organic solvents such as benzene, toluene, xylene, monochlorobenzene, o-dichlorobenzene, chloroform, ethylene dichloride, and diethyl ether; dioxane, tetrahydrofuran, Examples thereof include water-soluble organic solvents such as acetone, dimethylformamide, dimethyl sulfoxide, ethyl alcohol, and methyl alcohol. Among these, toluene, methyl alcohol, and ethyl alcohol are preferably used from the viewpoint that the catalyst, solvent, and the like can be easily recovered after the reaction.
[0027]
The amount of the reaction solvent used is usually 2 to 10 times the weight of the benzonitrile. When the usage-amount of a reaction solvent is less than 2 times weight, there exists a possibility that reaction may become difficult to advance smoothly. Moreover, when the usage-amount of a reaction solvent exceeds 10 times weight, there exists a possibility that a yield may fall not only volume efficiency may deteriorate.
[0028]
After completion of the reaction, the pressure is released to remove excess hydrogen sulfide from the reaction system, and then the reaction solution is cooled to precipitate thiobenzamides. The precipitated thiobenzamides can be easily isolated by a method such as filtration.
[0029]
The thiobenzamides thus obtained have the following general formula (2):
[0030]
[Chemical 6]
Figure 0004711494
[0031]
It is a compound represented by these.
[0032]
In the general formula (2), R 1 , R 2 and R 3 are each independently a hydrogen atom, a halogen atom, a hydroxyl group, a nitro group, or an alkyl having 1 to 4 carbon atoms as in the general formula (1). Group, an alkoxy group having 1 to 4 carbon atoms or an alkylthio group having 1 to 4 carbon atoms.
[0033]
Specific examples of the thiobenzamides include thiobenzamide, 4-chlorothiobenzamide, 2-bromothiobenzamide, 4-hydroxythiobenzamide, 3-methylthiobenzamide, 4-ethylthiobenzamide, 4-n-propylthiobenzamide, 4-n-butylthiobenzamide, 4-tert-butylthiobenzamide, 4-methoxythiobenzamide, 4-ethoxythiobenzamide, 4-n-propoxythiobenzamide, 4-n-butoxythiobenzamide, 4-tert-butoxythio Benzamide, 2-methyl-4-bromothiobenzamide, 2-methoxy-4-hydroxythiobenzamide, 2-ethyl-4-methoxythiobenzamide, 2-n-propoxy-4-chlorothiobenzamide, 2-n-propi -4-nitrothiobenzamide, 2-methylthio-4-chlorothiobenzamide, 2-methyl-4-bromo-6-hydroxythiobenzamide, 2-methoxy-4-hydroxy-6-nitrothiobenzamide, 2-n-propyl Examples include -4-nitro-6-methoxythiobenzamide, 2-methylthio-4-chloro-6-hydroxythiobenzamide, 2-n-propoxy-4-chloro-6-bromothiobenzamide and the like.
[0034]
【Example】
EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, this invention is not limited only to these Examples.
[0035]
Example 1
A 1 L pressure-resistant reaction vessel equipped with a stirrer, a thermometer, and a gas blowing tube was charged with 51.6 g (0.5 mol) of benzonitrile, 3.3 g (0.045 mol) of diethylamine, and 200 g of toluene at 100 ° C. It took 6 hours to react with 22 g (0.6 mol) of hydrogen sulfide. The pressure at that time was 784.5 to 980.6 kPa. After completion of the reaction, the pressure was released to remove excess hydrogen sulfide from the reaction system. Next, the reaction solution was cooled to 5 ° C., and the precipitated crystals were collected by filtration. The obtained crystal was washed with 100 g of toluene and dried to obtain 56.3 g (0.41 mol) of thiobenzamide. The yield based on benzonitrile was 82%.
[0036]
Example 2
In Example 1, 66.6 g (0.5 mol) of 4-methoxybenzonitrile was used instead of 51.6 g (0.5 mol) of benzonitrile, and trimethylamine was added instead of 3.3 g (0.045 mol) of diethylamine. Except that 1 g (0.035 mol) was used, 66.9 g (0.4 mol) of 4-methoxythiobenzamide was obtained in the same manner as in Example 1. The yield based on 4-methoxybenzonitrile was 80%.
[0037]
Example 3
In Example 1, 68.8 g (0.5 mol) of 4-chlorobenzonitrile was used instead of 51.6 g (0.5 mol) of benzonitrile, and triethylamine was used instead of 3.3 g (0.045 mol) of diethylamine. 65.2 g (0.38 mol) of 4-chlorothiobenzamide was obtained in the same manner as in Example 1 except that 5 g (0.025 mol) was used. The yield based on 4-chlorobenzonitrile was 76%.
[0038]
Example 4
In Example 1, 4-hydroxythiobenzamide 64 was used in the same manner as in Example 1 except that 59.6 g (0.5 mol) of 4-cyanophenol was used instead of 51.6 g (0.5 mol) of benzonitrile. .3 g (0.42 mol) was obtained. The yield based on 4-cyanophenol was 84%.
[0039]
Example 5
In the same manner as in Example 1, except that 98.0 g (0.5 mol) of 2-methyl-4-bromobenzonitrile was used instead of 51.6 g (0.5 mol) of benzonitrile, 2 -89.7 g (0.39 mol) of methyl-4-bromothiobenzamide was obtained. The yield based on 2-methyl-4-bromobenzonitrile was 78%.
[0040]
Example 6
Example 1 was the same as Example 1 except that 106.0 g (0.5 mol) of 2-methyl-4-bromo-6-hydroxybenzonitrile was used instead of 51.6 g (0.5 mol) of benzonitrile. As a result, 123.1 g (0.4 mol) of 2-methyl-4-bromo-6-hydroxythiobenzamide was obtained. The yield based on 2-methyl-4-bromo-6-hydroxybenzonitrile was 80%.
[0041]
Comparative Example 1
A 1 L reactor equipped with a stirrer, a thermometer and a gas blowing tube was charged with 51.6 g (0.5 mol) of benzonitrile, 3.3 g (0.045 mol) of diethylamine, and 200 g of toluene at 100 ° C. Under normal pressure conditions, 12 hours were required and 22 g (0.6 mol) of hydrogen sulfide was blown into the reaction. After completion of the reaction, the reaction solution was cooled to 5 ° C., and the precipitated crystals were collected by filtration. The obtained crystals were washed with 100 g of toluene and dried to obtain 13.7 g (0.1 mol) of thiobenzamide. The yield based on benzonitrile was 20%.
[0042]
【The invention's effect】
According to the present invention, by reacting benzonitriles and hydrogen sulfide under pressure in the presence of a catalyst, the amount of the catalyst used can be reduced, and thiobenzamides can be produced industrially advantageously.

Claims (2)

下記一般式(1);
Figure 0004711494
(式中、R1、R2、R3は、それぞれ独立して、水素原子、ハロゲン原子、水酸基、ニトロ基、炭素数1〜4のアルキル基、炭素数1〜4のアルコキシ基または炭素数1〜4のアルキルチオ基を表す。)
で表されるベンゾニトリル類と硫化水素とを、触媒の存在下に加圧下で反応させることを特徴とする下記一般式(2);
Figure 0004711494
(式中、R1、R2、R3は、前記一般式(1)と同様である。)
で表されるチオベンズアミド類の製造方法であって、
前記触媒がアルキルアミン類、又はピリジン類であり、
490.3〜1068.9kPaの加圧下で反応させることを特徴とするチオベンズアミド類の製造方法
The following general formula (1);
Figure 0004711494
(In the formula, R 1 , R 2 and R 3 are each independently a hydrogen atom, a halogen atom, a hydroxyl group, a nitro group, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms or a carbon number. Represents 1-4 alkylthio groups.)
The following general formula (2), characterized in that a benzonitrile represented by the formula and hydrogen sulfide are reacted under pressure in the presence of a catalyst;
Figure 0004711494
(In the formula, R 1 , R 2 and R 3 are the same as those in the general formula (1).)
A process for producing thiobenzamides represented by :
The catalyst is an alkylamine or pyridine;
A method for producing a thiobenzamide, characterized by reacting under a pressure of 490.3 to 1068.9 kPa .
触媒の使用量が、ベンゾニトリル類に対して0.1〜20モル%である請求項1に記載のチオベンズアミド類の製造方法。The method for producing a thiobenzamide according to claim 1, wherein the amount of the catalyst used is 0.1 to 20 mol% with respect to the benzonitrile.
JP2000242240A 2000-08-10 2000-08-10 Method for producing thiobenzamides Expired - Lifetime JP4711494B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000242240A JP4711494B2 (en) 2000-08-10 2000-08-10 Method for producing thiobenzamides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000242240A JP4711494B2 (en) 2000-08-10 2000-08-10 Method for producing thiobenzamides

Publications (2)

Publication Number Publication Date
JP2002053546A JP2002053546A (en) 2002-02-19
JP4711494B2 true JP4711494B2 (en) 2011-06-29

Family

ID=18733286

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000242240A Expired - Lifetime JP4711494B2 (en) 2000-08-10 2000-08-10 Method for producing thiobenzamides

Country Status (1)

Country Link
JP (1) JP4711494B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2441752B1 (en) * 2009-06-09 2013-12-11 Teijin Pharma Limited Method for producing 4-substituted benzothioamide derivative
CN102924353A (en) * 2012-04-24 2013-02-13 苏州皓翔化学科技有限公司 Febuxostat intermediate preparation method
CN102702054A (en) * 2012-06-29 2012-10-03 晋城海斯制药有限公司 Preparation method of p-hydroxythiobenzamide

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS519720A (en) * 1974-07-11 1976-01-26 Ishihara Sangyo Kaisha JOSOZAI
JPH1160552A (en) * 1997-08-13 1999-03-02 Teijin Ltd Production of thiobenzamide derivative
JP2000229920A (en) * 1999-02-12 2000-08-22 Otsuka Pharmaceut Co Ltd Production of amide derivative

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05320126A (en) * 1992-05-19 1993-12-03 Kawaguchi Kagaku Kogyo Kk Production of 2-amino-5-nitrothiobenzamide

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS519720A (en) * 1974-07-11 1976-01-26 Ishihara Sangyo Kaisha JOSOZAI
JPH1160552A (en) * 1997-08-13 1999-03-02 Teijin Ltd Production of thiobenzamide derivative
JP2000229920A (en) * 1999-02-12 2000-08-22 Otsuka Pharmaceut Co Ltd Production of amide derivative

Also Published As

Publication number Publication date
JP2002053546A (en) 2002-02-19

Similar Documents

Publication Publication Date Title
JP5247436B2 (en) Method for producing methylene disulfonate compound
JP4342940B2 (en) Process for producing 5-methyl-1-phenyl-2 (1H) pyridinone
JP2009035496A (en) METHOD FOR PRODUCING beta-NITROSTYRENE COMPOUND
CN113402424A (en) Synthetic method of cyanoacrylate compound
JP4711494B2 (en) Method for producing thiobenzamides
JP2006188449A (en) Method for producing cyclic disulfonic acid ester
JP4716547B2 (en) Method for producing 2-phenylthiazoles
JPH11228540A (en) Production of 2-(4-pyridyl)ethanethiol
WO2021237945A1 (en) Method for preparing 3,6-dichloropyrazine-2-carbonitrile
JPH01238564A (en) Production of aromatic nitrile
CN113717123B (en) Preparation method of metamifop
CN114315773B (en) Piperazine compound and preparation method thereof
US20030162975A1 (en) Method for preparing substituted 5-amino-n-phenyl-1,2,4-triazole-3-sulfonamides
JP2879164B2 (en) Method for producing substituted 2-cyanoimidazole compounds
JP3653779B2 (en) Process for producing 1,2,3-trichloro-4,6-dinitrobenzene
JP4265259B2 (en) Method for producing chloroformic acid benzyl esters
JP5754842B2 (en) Method for producing p-iodophenol
JP4183781B2 (en) Method for producing S, S- (6-methylquinoxaline-2,3-diyl) dithiocarbonate
JP4752121B2 (en) Method for producing nitrile derivative, intermediate thereof and method for producing intermediate
CN114105889A (en) Preparation method and application of DPP-IV inhibitor key intermediate
JP2020523353A (en) Process for producing 3,4-dichloro-N-(2-cyanophenyl)-5-isothiazolecarboxamide
JPH01153669A (en) Production of aromatic nitrile
JPS6354707B2 (en)
JPH08208586A (en) Production of 4'-cyanobiphenyl-4-ol
JPH0687852A (en) Production of 2-acetylbenzo(b)thiophene

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20070730

RD03 Notification of appointment of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7423

Effective date: 20070730

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20101207

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110203

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110301

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110322

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250