Intramolecular cyclizations of allyl- and prop-2-ynyl-silanes with the terminal group governing the regiochemical outcome of the cyclization
作者:Dieter Schinzer、Jürgen Steffen、Sándor Sólyom
DOI:10.1039/c39860000829
日期:——
The intramolecular additions of allyl- and prop-2-ynyl-silanes to enones and dienones are described; cyclizations carried out using 1.1 equiv. of either EtAlCl2 in toluene or TiCl4 in methylene chloride at low temperature have shown that the terminal group governs the regiochemical outcome of the cyclization, with allylsilane leading to 1,6 addition and prop-2-ynylsilane to 1,4 addition.