Reactions of O-silylated enolates with allylsilane bifunctional [4+2] and [5+2] annulating reagents
作者:Thomas V. Lee、Raymond J. Boucher、John R. Porter、Caroline J.M. Rockell
DOI:10.1016/s0040-4020(01)89115-8
日期:1989.1
The reactions of the two allylsilane-acetals (8) and (9) with various O-silylated enolates is described. This has resulted in a new route to fused carbocyclic six and seven-membered rings in a one-pot reaction by use of a chemospecific allylsilane based bifunctional annulating reagent.
Direct access to functionalised allylsilanes: The cerium(III) mediated grignard reaction of functionalised esters and lactones.
作者:Thomas V. Lee、John R. Porter、Frances S. Roden
DOI:10.1016/s0040-4039(00)80666-8
日期:1988.1
(III) chloride alters the chemoselectivity of the reaction of the Grignard reagent (1) with ester-acetals and also greatly improves the efficiency of reaction with lactones. In addition it gives improved preparations of the useful intermediates (8), (11) and (12) giving direct access to valuable functionalised allylsilanes of use in annulation reactions.