4-Chloro-5H-1,2,3-dithiazol-5-one: a good α-thiocyanating agent for α,β-unsaturated β-amino esters
作者:Young Seok Park、Kyongtae Kim
DOI:10.1016/s0040-4039(99)01235-6
日期:1999.8
Treatment of 4-chloro-5H-1,2,3-dithiazol-5-one with 3-alkyl (or aryl)-3-amino-2-propenoate esters in DMSO at 120°C gave the corresponding 2-thiocyanated esters 4 (major) and 5-alkoxycarbonyl-4-alkyl (or aryl)-4-thiazolin-2-ones 5 (minor), whereas the esters bearing a strong electron-withdrawing group at C-3 under the same conditions afforded 5 and/or 4-substituted 5-alkoxycarbonyl-2-aminothiazoles
在120°C下于DMSO中用3-烷基(或芳基)-3-氨基-2-丙烯酸酯处理4-氯-5 H -1,2,3-二噻唑-5-酮,得到相应的2-硫氰酸酯4(主要)和5-烷氧基羰基-4-烷基(或芳基)-4-噻唑啉-2-酮5(次要),而在相同条件下在C-3带有强吸电子基团的酯得到5和/或4-取代的5-烷氧基羰基-2-氨基噻唑6,取决于吸电子基团。
US3932436A
申请人:——
公开号:US3932436A
公开(公告)日:1976-01-13
US4273573A
申请人:——
公开号:US4273573A
公开(公告)日:1981-06-16
Hydrogen Peroxide-Mediated Rapid Room Temperature Metal-Free C(sp<sup>2</sup>)-H Thiocyanation of Amino Pyrazoles, Amino Uracils, and Enamines
作者:Danish Ali、Anoop Kumar Panday、Lokman H. Choudhury
DOI:10.1021/acs.joc.0c01738
日期:2020.11.6
aminopyrazoles, aminoisoxazole, aminoisothiazole, amino uracils, and aliphatic enamines has been developed in an aqueous medium using hydrogenperoxide as a benign oxidant and ammonium thiocyanate as a thiocyanating agent. On the otherhand, the reaction of hydrogenperoxide and ammonium thiocyanate followed by one-pot addition of NaOH provides the corresponding disulfides in the case of amino azoles, and