2,4,4,6-Tetrabromo-2,5-cyclohexadienone (TABCO), N-Bromosuccinimide (NBS) and Bromine as Efficient Catalysts for Dithioacetalization and Oxathioacetalization of Carbonyl Compounds and Transdithioacetalization Reactions
作者:Nasser Iranpoor、Habib Firouzabadi、Hamid Reza Shaterian、M. A. Zolfigol
DOI:10.1080/10426500211712
日期:2002.5.1
6-tetrabromo-2,5-cyclohexadienone (TABCO), N-bromosuccinimide (NBS), and bromine as efficient catalysts for conversion of carbonyl compounds to their cyclic and acyclic dithioacetals and 1,3-oxathiolanes under mild reaction conditions are described. These catalysts are also used for efficient transdithioacetalization of acetals, diacetals, ketals, acylals, enamines, hydrazones, and oximes with high
使用 2,4,4,6-四
溴-2,5-环
己二烯酮 (TABCO)、N-
溴代琥珀
酰亚胺 (
NBS) 和
溴作为有效催化剂将羰基化合物转化为环状和无环二
硫缩醛和 1,3-描述了在温和反应条件下的
硫杂
环戊烷。这些催化剂还用于在
硫醇存在下以高产率有效地将
缩醛、二
缩醛、
缩酮、酰基、烯胺、腙和
肟转二
硫缩醛。