Ambiphilic allenyl enolates: reactions with electrophiles
作者:Sang-Ho Lee、Mei-Jue Shih、Martin Hulce
DOI:10.1016/0040-4039(92)88045-7
日期:1992.1
Allenylenolates generated from 1,6 additions of organocopper reagents to 3-ethynyl-2-cycloalkenones act as ambident α,γ-nucleophiles. The γ:α ratio of products is a function of carbon hybridization, steric environment, and cycloalkenone ring size; typically, γ-products predominate.
Palladium-catalyzed synthesis of dienynes related to vitamin D from enol triflates
作者:L. Castedo、A. Mouriño、L.A. Sarandeses
DOI:10.1016/s0040-4039(00)84303-8
日期:1986.1
This note describes a simple synthesis of Lythgoe-type dienynes based on palladium catalyzed coupling of kinetic Grundmann's ketone enoltriflate and acetylenic compounds containing the vitamin D A-ring fragment.