Unexpected cyclisation of an acetylenic acetal: vinyl cation capture by internally transferred hydride
作者:David Keirs、Karl Overton、Krishan Thakker
DOI:10.1039/c39900000310
日期:——
The acetylenicacetal (2) is converted in 90% yield to a mixture of cholesta-3,5- and 4,6-dienes on reflux in toluene containing toluene-p-sulphonic acid.