A convenient method for the synthesis of 2-amino substituted aza-heterocycles from N,N′-disubstituted thioureas using TsCl/NaOH
摘要:
p-Toluenesulfonyl chloride (TsCl)/NaOH has been introduced as reagent combination for the synthesis of 2-amino-oxa- or 2-amino-thiazolidines from N-(2-hydroxyethyl)-thioureas, but its general application in heterocycle synthesis has not been investigated. In this paper the convenient and efficient synthesis of a variety of 2-amino-substituted 1-aza 3-(aza, oxo or thio) heterocycles of different substitution and ring sizes is described. The application of polymer-supported TsCl facilitates work-up and renders the reaction conditions very suitable for parallel or robot synthesis. (C) 2004 Elsevier Ltd. All rights reserved.
2-Phenyliminothiazolines, their preparation method and anti-rice blast agent containing the same
申请人:——
公开号:US20030203950A1
公开(公告)日:2003-10-30
2-phenyliminothiazolines of the following formula I, their salts, their preparation method and their use for treating rice blast. The phenyliminothiazolines and their salts of the present invention have low toxicity to environment or living organisms, and exert high activity at low concentration for treating rice blast through a new controlling mechanism, that is by inhibiting pentaketide synthesis and cyclization of the melanin sythesis process in formula I.
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下式I的2-苯基亚氨基噻唑类化合物、它们的盐、它们的制备方法和它们在治疗稻瘟病中的用途。本发明的苯基亚氨基噻唑类化合物及其盐类对环境和生物体毒性低,通过新的控制机制,即通过抑制式 I 中戊酮内酯的合成和黑色素合成过程的环化,在低浓度下发挥高活性,用于治疗稻瘟病。
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