Carbocycle formation via intramolecular insertion of alkynes into titanium-carbon bonds
作者:Arthur E. Hams、John R. Stille
DOI:10.1016/s0040-4039(00)60986-3
日期:1992.10
titanocene chloride complexes with the Lewis acids EtAlCl2 or Me2AlCl resulted in intramolecular insertion of a tethered alkyne into the TiC bond. Regioselective alkyne insertion produced exocyclic trisubstituted alkene products resulting from four-, five-, and six-membered ring formation. In the case of cyclohexane formation, the alkyne was found to insert with syn stereoselectivity.
用路易斯酸EtAlCl 2或Me 2 AlCl处理烷基二茂钛氯化物络合物会导致将束缚的炔烃分子内插入TiC键中。区域选择性炔烃插入产生了由四元,五元和六元环形成的环外三取代烯烃产物。在形成环己烷的情况下,发现炔以顺式立体选择性插入。