设计并合成了一系列芳氧基乙酸衍生物,作为4-羟基苯基丙酮酸双加氧酶(HPPD)抑制剂。初步的生物测定结果表明,这些衍生物是有前途的拟南芥HPPD(At HPPD)抑制剂,特别是化合物I12(K i = 0.011 µM)和I23(K i = 0.012 µM),其活性与市售甲基磺草酮相似。 HPPD除草剂(K i = 0.013 µM)。此外,新合成的化合物在150 g ai / ha的剂量下对被测杂草显示出显着的温室除草活性。特别是II4在芽前处理中表现出较高的除草活性,略高于甲基磺草酮。此外,化合物II4对于玉米田中150 g ai / ha的杂草防治是安全的,并且被确定为新型HPPD抑制剂除草剂的最有效候选者。本文所述的化合物可为设计新的抑制HPPD的除草剂及其修饰提供有用的指导。
设计并合成了一系列芳氧基乙酸衍生物,作为4-羟基苯基丙酮酸双加氧酶(HPPD)抑制剂。初步的生物测定结果表明,这些衍生物是有前途的拟南芥HPPD(At HPPD)抑制剂,特别是化合物I12(K i = 0.011 µM)和I23(K i = 0.012 µM),其活性与市售甲基磺草酮相似。 HPPD除草剂(K i = 0.013 µM)。此外,新合成的化合物在150 g ai / ha的剂量下对被测杂草显示出显着的温室除草活性。特别是II4在芽前处理中表现出较高的除草活性,略高于甲基磺草酮。此外,化合物II4对于玉米田中150 g ai / ha的杂草防治是安全的,并且被确定为新型HPPD抑制剂除草剂的最有效候选者。本文所述的化合物可为设计新的抑制HPPD的除草剂及其修饰提供有用的指导。
Provided is a method for producing a chlorophenoxycarboxylate, comprising the following steps of: a phenoxycarboxylate under actions of a catalyst A and a catalyst B performing a selective chlorination of a chlorinating agent at a 2-position and/or a 4-position to obtain the chlorophenoxycarboxylate; the catalyst A is a Lewis acid; and the catalyst B has the following structure: R1′—S—R2′. The present disclosure redesigns the process route, and finely screens the catalyst and the chlorinating agent, thereby effectively improving the chlorination selectivity while avoiding the loss of the active ingredient, and the content of the obtained chlorophenoxycarboxylate can reach more than 98.5%, and the yield can reach more than 99%.
本发明提供了一种生产氯苯氧羧酸酯的方法,包括以下步骤:苯氧羧酸酯在催化剂 A 和催化剂 B 的作用下,在 2 位和/或 4 位上对氯化剂进行选择性氯化,以获得氯苯氧羧酸酯;催化剂 A 是路易斯酸;催化剂 B 具有以下结构:R1′-S-R2′。本发明重新设计了工艺路线,对催化剂和氯化剂进行了精细筛选,从而在避免有效成分损失的同时,有效提高了氯化选择性,得到的氯苯氧羧酸酯含量可达98.5%以上,收率可达99%以上。
Munch-Petersen, Acta Chemica Scandinavica (1947), 1953, vol. 7, p. 14,19
作者:Munch-Petersen
DOI:——
日期:——
ACETAMIDO ACETONITRILE DERIVATIVES AS INHIBITORS OF CATHEPSIN L AND/OR CATHEPSIN S
申请人:AstraZeneca AB
公开号:EP1155010A1
公开(公告)日:2001-11-21
PREPARATION METHOD FOR CHLOROPHENOXYCARBOXYLATE
申请人:SHANDONG RAINBOW BIOTECH CO., LTD.
公开号:US20210002201A1
公开(公告)日:2021-01-07
Provided is a method for producing a chlorophenoxycarboxylate, comprising the following steps of: a phenoxycarboxylate under actions of a catalyst A and a catalyst B performing a selective chlorination of a chlorinating agent at a 2-position and/or a 4-position to obtain the chlorophenoxycarboxylate; the catalyst A is a Lewis acid; and the catalyst B has the following structure: R
1
′—S—R
2
′. The present disclosure redesigns the process route, and finely screens the catalyst and the chlorinating agent, thereby effectively improving the chlorination selectivity while avoiding the loss of the active ingredient, and the content of the obtained chlorophenoxycarboxylate can reach more than 98.5%, and the yield can reach more than 99%.