A new cycloheptenone annulation method: use of the bifunctional reagent (Z )-5-iodo-1-tributylstannylpent-1-ene in organic synthesis

Abstract

A new seven-membered annulation method that employs (Z)-5-iodo-1-tributylstannylpent-1-ene (1) as a key reagent and that is exemplified by the conversion of compounds 6, 12, 13, 20, 25, and 26 into the annulation products 11, 18, 19, 24, 33, and 34, respectively, is reported.