An Efficient Synthesis of 1-Allyl-1-Cyano-1-Alkenes and Related Structures
作者:Bernard MAUZÉ、Léone Miginiac
DOI:10.1080/00397919208019076
日期:1992.8
Abstract The one-pot synthesis of 1-allyl-1-cyano-1-alkenes is easily obtained from 1-allyl-1-trimethylsilylacetonitrile lithium and carbonyl derivatives via a silyl-Wittig-Peterson reaction. Other related compounds are prepared in the same manner.
Preparation of α-functionalized alkenylmagnesium reagents via a halide–magnesium exchange
作者:Jérôme Thibonnet、Viet Anh Vu、Laurent Bérillon、Paul Knochel
DOI:10.1016/s0040-4020(02)00439-8
日期:2002.6
A general preparation of alkenylmagnesium derivatives bearing an electron-withdrawing function in the alpha-position (Y=CN, CO2R, CONR2, SO2Ph) has been made possible by using a low temperature (-40 to -30degreesC) bromine-magnesium exchange with i-PrMgBr in THF. This reaction has also been used to prepare 5-magnesiated-1,3-dioxin-4-one derivatives bearing an alkoxy substituent in beta-position to the carbon-magnesium bond. (C) 2002 Published by Elsevier Science Ltd.