Destannylative pummerer-type rearrangement of 1-(phenylsulfinyl)-1-(tributylstannyl)cyclopropane
作者:Manat Pohmakotr、Srisamorn Sithikanchanakul
DOI:10.1016/s0040-4039(00)70673-3
日期:——
1-(Phenylsulfinyl)-1-(tributylstannyl)cyclopropane on treatment with acyl chlorides or alkyl chloroformate in refluxing dichloromethane afforded 1-acyloxy-1-phenylsulfenyl- and 1-alkoxycarbonyloxy-1-phenylsulfenylcyclopropanes, respectively. The reaction involves the Pummerer-type rearrangement with loss of tributylstannyl group.
1-(Tributylstannyl)-1-(phenylsulfinyl)-cyclopropane and -ethene were found to react with acyl chlorides to provide the corresponding 1-acyloxy-1-(phenylthio)-cyclopropanes and -ethenes. The reaction involves the Pummerer-type rearrangement with loss of the tributylstannyl group.
NON-CARBONIUM ION CHARACTER OF THE INTERMEDIATE IN THE PUMMERER REACTION OF PHENYLSULFINYLCYCLOPROPANES AND (PHENYLSULFINYLMETHYL)CYCLOPROPANE WITH ACETIC ANHYDRIDE
The Pummerer reaction of phenylsulfinylcyclopropanes and (phenylsulfinylmethyl)cyclopropane with acetic anhydride afforded 1-acetoxy-1-(phenylmercapto)cyclopropanes and (α-acetoxyphenylmercaptomethy1)cyclopropane in high yields unlike in the acetolysis of 1-chloro-1-(phenylmercapto)cyclopropanes. Thus, the Pummerer reaction is considered to proceed via an ylide-ylene-ion pair.