New Methods for Synthesis of α,β-Unsaturated Carboxylic Esters from Carbonyl Compounds Using Monoanions of Dithiocarbonates, and Dianions of Ethyl Mercaptoacetate and Ethyl 2-Mercaptopropionate
The lithium enolates of O-alkyl S-alkoxycarbonylmethyl dithiocarbonates and monothiocarbonates were found to be efficient reagents for the synthesis of α,β-unsaturated esters from carbonylcompound...
Methyl vinyl ketone and 2-mercaptoethylamine react under basic conditions to yield a 1,4-thiazepine. Cyclisation of products from reaction of thioglycollic acid with 1,2-epoxides yield substituted 1,4-thioxans.
Abstract A rapid one-pot reaction of epoxides with ethyl mercaptoacetate furnishing 1,4-oxathian-2-ones in the presence of a catalytic amount of eco-friendly triton B is reported. High regioselectivity is due to the nucleophilic attack on the less sterically hindered carbon atom of the aliphatic unsymmetrical epoxide.
摘要报道了在催化量的环保氚 B 存在下,环氧化物与巯基乙酸乙酯的快速一锅反应,提供 1,4-oxathian-2-ones。高区域选择性是由于对脂肪族不对称环氧化物的空间位阻较小的碳原子的亲核攻击。
Jankowski,K. et al., Bulletin de l'Academie Polonaise des Sciences, Serie des Sciences Chimiques, 1971, vol. 19, p. 661 - 671