R3SiMgMe and MnCl2 are disclosed. (1) The manganese species reacted with terminal acetylenes to give 1,2-disilylated 1-alkenes. Mono- and bis(trimethylsilyl) acetylenes gave tri- and tetrasilylated ethenes, respectively, in good yields. Highly strained tetrakis(trimethylsilyl) ethene has now become easily accessible by this technique. (2) The reaction of alkenyl halides, alkenyl sulfides, and enol phosphates
The reaction of alkenyl halides, alkenyl sulfides, and enol phosphates with (R3Si)3MnMgMe provides vinylsilanes in good yields. The method is also applicable to the allylsilanesynthesis from allylic sulfides and ethers.
A Sakurai−Prins−Ritter Sequence for the Three-Component Diastereoselective Synthesis of 4-Amino Tetrahydropyrans
作者:Oleg L. Epstein、Tomislav Rovis
DOI:10.1021/ja066794k
日期:2006.12.1
A simple one-pot procedure for the Sakurai-Prins-Ritter sequence allows rapid assembly of 4-acylamino-2,6-substituted tetrahydropyrans in high yields and with excellent diastereoselectivity from readily available 4-acetoxy-1,3-dioxanes, allylsilanes, and nitriles. A variety of nitriles have been shown to participate. Diastereoselectivities are uniformly high and observed stereochemistry of cation trapping proceeds according to Alder's model of the 4-tetrahydropyranyl cation.
[EN] PLATINUM METALLACYCLES COMPRISING N,P,OR AS RINGATOMS AND THEIR USE AS CATALYSTS IN 1,2-HYDROSILYLATION REACTIONS OF DIENES<br/>[FR] 1,2-HYDROSILYLATION DE DIÈNES
申请人:HARVARD COLLEGE
公开号:WO2014138113A3
公开(公告)日:2014-12-04
Fleming, Ian; Higgins, Dick; Lawrence, Nicholas J., Journal of the Chemical Society. Perkin transactions I, 1992, # 24, p. 3331 - 3350
作者:Fleming, Ian、Higgins, Dick、Lawrence, Nicholas J.、Thomas, Andrew P.