Zur umsetzung von trimethylsilyl-methylen-dimethylsulfuran mit carbonylverbindungen
作者:Clemens Fleischmann、Erich Zbiral
DOI:10.1016/s0040-4020(01)93586-0
日期:1978.1
The first step in the reaction of trimethylsilylmethylene-dimethylsulfurane 1 (prepared from (CH3)3SiCH2S̄(CH3)2Ī with 1 equivalent (CH3)3COK) with carbonyl compounds (R1)(R2)CHCOCH2R32 leads Peterson-like way to the non-isolable vinylsulfoniumdimethylsilanolate-intermediate B or its recombined product A. Depending on the reaction conditions and the nature of the substituents R1, R2 and R3 there exist
Synthesis of methyl vinyl sulfides: The role of boron trifluoride in promoting a Horner-Wittig type reaction
作者:Elie Stéphan、Adina Olaru、Gérard Jaouen
DOI:10.1016/s0040-4039(99)01829-8
日期:1999.12
reacted with ketones in a two step process, the first stage being reversible. Methyl vinyl sulfides are formed only when the elimination step was rapid. When the second step occurred at a slow rate. the sequence required the use of boron trifluoride etherate for completion. New methyl vinyl sulfides were prepared by reaction with various ketones, including enolisable and bulky compounds.