A First Example Using<i>o</i>-Iodoxybenzoic Acid (IBX) in Combination with Tetraethylammonium Bromide (TEAB) for Ring Expansion of 1,3-Dithiolanes and 1,3-Dithianes
作者:Krishnacharya G. Akamanchi、Vidyanand G. Shukla、Paresh D. Salgaonkar
DOI:10.1055/s-2005-868496
日期:——
one-pot procedure for the synthesis of dihydro- 1,4-dithiins and dihydro-1,4-dithiepines from the corresponding 1,3-dithiolanes and 1,3-dithianes using o-iodoxybenzoic acid (IBX) in combination with tetraethylammonium bromide (TEAB) is de- scribed. The salient features of the protocol include mild reaction conditions, short reaction times and high yields.
Facile synthesis of substituted dihydro-1,4-dithiins and -1,4-dithiepins from α-oxo ketene cyclic dithioacetals
作者:Dewen Dong、Ran Sun、Haifeng Yu、Yan Ouyang、Qian Zhang、Qun Liu
DOI:10.1016/j.tetlet.2005.08.128
日期:2005.10
A novel and facile synthesis of substituted 2,3-dihydro-1,4-dithiins and 6,7-dihydro-5H-1,4-dithiepins based on the reactions of α-bromo/hydroxy ketones with α-oxo ketenecyclicdithioacetals has been developed. A general mechanism for the reactions is proposed.
基于α-溴/羟基酮与α-氧代乙烯酮环的反应,可轻松合成新颖的取代的2,3-二氢-1,4-二硫辛和6,7-二氢-5 H -1,4-二硫平已开发出二硫缩醛。提出了反应的一般机理。