Halogen-magnesium exchange of various aryl halides is achieved with a magnesium ate complex at low temperatures; Tributylmagnesate ((Bu3MgLi)-Bu-n) induces facile iodine-magnesium exchange at -78 degreesC. Dibutylisopropylmagnesate ((PrBu2MgLi)-Pr-i-Bu-n) is more reactive than (Bu3MgLi)-Bu-n, and this reagent accomplishes selective bromine-magnesium exchange at -78 degreesC. This procedure is utilized for the preparation of various polyfunctionalized arylmagnesium species. The exchange of alkenyl halides using this method proceeds with retention of configuration of the double bond.
A stereoselective synthesis of (E)-1,2-disubstituted vinylsilanes from ethynyltrimethylsilane and alkylcopper via 1-trimethylsilyl-1(Z)-alkenylcopper
作者:Michio Obayashi、Kiitiro Utimoto、Hitosi Nozaki
DOI:10.1016/s0040-4039(01)83609-1
日期:1977.1
A regio- and stereoselective synthesis of 1,2-disubstituted vinylsilanes
作者:Michio Obayashi、Kiitiro Utimoto、Hitosi Nozaki
DOI:10.1016/s0022-328x(00)92339-8
日期:1979.9
OBAYASHI M.; VTIMOTO K.; NOZAKI H., J. ORGANOMETAL. CHEM., 1979, 177, NO 1, 145-152
作者:OBAYASHI M.、 VTIMOTO K.、 NOZAKI H.
DOI:——
日期:——
ZHANG, Y.;MILLER, J. A.;NEGISHI, EI-ICHI, J. ORG. CHEM., 54,(1989) N, C. 2043-2044