A simple preparation of several new 2,3- and 1,2,3-substituted buta-1,3-dienes form 1,4-dichlorobutyne
作者:Alexander J. Bridges、John W. Fischer
DOI:10.1016/s0040-4039(00)81432-x
日期:1983.1
Addition of (psesudo) halogens across the triple bond of 1,4-dichlorobut-2-yne, followed by a 1,4-elimination, provides a very simple preparation of ten novel butadienes.
A copper-catalyzed vicinal chloro-thiolation of alkynes with inexpensive and diversified sulfonyl chlorides RSO2Cl (R = aryl, alkyl) has been developed. This practical and scalable reaction could be used for the construction of a number of unexplored bioactive chlorothiolated alkenes. Internal alkynes could also undergo the chloro-thiolation to provide tetrasubstituted alkynes. Preliminary mechanistic