作者:M. Franck-Neumann、P. Geoffroy、M. Miesch、F.Zaragoza Dörwald
DOI:10.1016/s0040-4039(00)97558-0
日期:1990.1
The possibility of achieving convergent syntheses with elaborate carbenes is illustrated by the isobutenylalkynylcarbene II (R Br). By reaction with 3-cyclohexen-1-one, the endo cyclopropanic adduct IIIa is formed as a major product. Metalation with MeLi, followed by reaction with MeI, proceeds with inversion of configuration (-> sesquicarene skeleton, XI), or, after protection of the ketofunction
异丁烯基炔基卡宾II(RBr)说明了用精细的卡宾合成收敛的可能性。通过与3-环己烯-1-酮反应,形成内环丙烷加合物IIIa作为主要产物。用MeLi金属化,然后与MeI反应,进行构型反转(->倍半碳烯骨架,XI),或在保护了酮功能后,保留构型(->异倍半碳烯VIII)。