作者:Kee-Jung Lee、Jae Uk Jeong、Dae Ock Choi、Seong Heon Kim、Hokoon Park
DOI:10.1055/s-1991-26504
日期:——
A series of 2-alkylthio-4,5-dihydro-5-methoxythiazoles 3 were prepared by thermal or diethyl ether-boron trifluoride mediated intramolecular cyclization of the corresponding N-(2,2-dimethoxyethyl)dithiocarbamic acid esters 2. Methyl N-(2,2-dimethoxyethyl)dithiocarbamate (2b) and 4,5-dihydro-5-methoxy-2-methylthiothiazole (3b) were converted by a two-step sequence to methyl 2-methyl-3-thioxo-1,2,3,4-tetrahydro-1,2,4-triazine-4-carbodithioate (6).
一系列2-烷硫基-4,5-二氢-5-甲氧基噻唑3通过相应的N-(2,2-二甲氧基乙基)二硫代氨基甲酸酯2的热或二乙醚-三氟化硼介导的分子内环化反应制备而成。甲基N-(2,2-二甲氧基乙基)二硫代氨基甲酸酯(2b)和4,5-二氢-5-甲氧基-2-甲基硫基噻唑(3b)通过两步序列转化为甲基2-甲基-3-硫酮-1,2,3,4-四氢-1,2,4-三嗪-4-羰二硫代酸酯(6)。