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噻吩磺隆的合成

作  者:
周新建;李梅芳
单  位:
江苏快达农化股份有限公司
关键词:
噻吩磺隆;3-氨基噻吩-2-羧酸甲酯;合成
摘  要:
以2,3-二氯丙腈和2-巯基乙酸甲酯为原料,在甲醇钠作用下环合制得3-氨基噻吩-2-羧酸甲酯,再经"一锅法"重氮化、氯磺化和氨化反应制得3-氨基磺酰基噻吩-2-羧酸甲酯,进一步与光气反应转化为相应的异氰酸酯后与2-氨基-4-甲氧基-6-甲基-1,3,5-三嗪缩合制得噻吩磺隆。
译  名:
Synthesis of Thifensulfuron-methyl
作  者:
ZHOU Xin-jian;LI Mei-fang;Jiangsu Kuaida Agrochemical Co., Ltd.;
关键词:
thifensulfuron-methyl;;methyl-3-aminothiophene-2-carboxylate;;synthesis
摘  要:
Methyl-3-aminothiophene-2-carboxylate, which was obtained by cyclization reaction of 2,3-dichloropro-pionitrile and methyl 2-mercaptoacetate in presence of sodium methoxide, was used as starting material for preparation of methyl 3-aminosulfonylthiophene-2-carboxylate by sequential reactions of diazotization, chlorosulfonation and ammonia-tion in one-pot. Then methyl-3-aminosulfonylthiophene-2-carboxylate reacted with phosgene to give the corresponding isocyanate, which was subjected to a further condensation with 2-amino-4-methoxy-6-methyl-1,3,5-triazine to obtain the target product thifensulfuron-methyl.

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