Dithio compounds, pharmaceutical preparations containing them and their use
申请人:Zyma SA
公开号:EP0099329B1
公开(公告)日:1990-10-31
US4818765A
申请人:——
公开号:US4818765A
公开(公告)日:1989-04-04
US4946861A
申请人:——
公开号:US4946861A
公开(公告)日:1990-08-07
Trimethylsilyloxide-Catalysed Peterson Olefinations with 2,2-Bis(trimethylsilyl)-1,3-dithiane
作者:Atul Manvar、Donal F. O'Shea
DOI:10.1002/ejoc.201501185
日期:2015.11
The synthesis of the reagent 2,2-bis(trimethylsilyl)-1,3-dithiane was directly achieved in an excellent yield from1,3-dithiane in one step. The bench-stable reagent can be utilized for Peterson olefinations using either TMSOK/Bu4NCl or fluoride ion as promoter of α-silyl carbanion formation, thereby generating ketenedithioacetals, which are versatile intermediates in organic synthesis. Olefination
Fluorinated Ketene Dithioacetals;1. Preparation and Application to the Synthesis of α-Trifluoromethylthiocarboxylic<i>S</i>-Esters and Aldehyde Derivatives
作者:Murielle Muzard、Charles Portella
DOI:10.1055/s-1992-26280
日期:——
α-Trifluoromethylketene dithioacetals 3 were synthesized by Peterson reaction from trifluoromethyl ketones 1 and trimethylsilyl dithioacetals 2. Acid hydrolysis and reduction yielded α-trifluoromethylthiocarboxylic S-esters 4 and α-trifluoromethyl dithioacetals 5, respectively. Transacetalisation of the latter with ethanol gave the corresponding diethyl acetal. New procedures were developed to effect reduction and transacetalisation.