Rapid Method for the Ring Expansion of 1,3-Dithiolanes and 1,3-Dithianes with <i>tert</i>-Butyl Hypochlorite
作者:K. Akamanchi、Nitin Arote、Vikas Telvekar
DOI:10.1055/s-2005-921906
日期:——
A new method for the ring expansion of 1,3-dithiolanes and 1,3-dithianes to dihydro-1,4-dithiins and dihydro-1,4-dithiepines, respectively, using tert-butylhypochlorite at room temperature is described. The salient features of the protocol include mild reaction conditions, very short reaction time, and high yield.
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.