Preparation and regio- and diastereoselective reactions of allylic zirconium reagents from allylic ether derivatives
作者:Hisanaka Ito、Takeo Taguchi、Yuji Hanzawa
DOI:10.1016/s0040-4039(00)91605-8
日期:1992.3
Allylic zirconium reagents were generated by treating allylic ether derivatives with zirconocene “Cp2Zr”. The allylic zirconium reagents reacted with aldehydes in highly regio- and diastereoselective manner to give homoallylicalcohol compounds.
Organoborane-catalyzedhydroalumination of terminal allenes with dichloroaluminum hydride gives rise to the corresponding allylaluminum compounds under mild conditions with high regioselectivity.
Stereoselective Synthesis of γ-Substituted (<i>Z</i>)-Allylic Boranes via Kinetically Controlled Hydroboration of Allenes with 10-TMS-9-borabicyclo[3.3.2]decane
作者:Jeremy Kister、Amy C. DeBaillie、Ricardo Lira、William R. Roush
DOI:10.1021/ja905494c
日期:2009.10.14
Kineticallycontrolled hydroboration of allenes 8 and 14a-d with the readily accessible Soderquist borane 7, which is generated in situ from borohydride 6, constitutes a convenient and preparatively useful method for synthesis of (Z)-gamma-(substituted)allylboranes 9 and 15a-d. These allylboranes undergo highly diastereo- (> or = 90: 10) and enantioselective (typically 89-96% e.e.) allylboration reactions