Novel Vinyl Phosphonates and Vinyl Boronates by Halogenation, Allylation, and Propargylation of α-Boryl- and α-Phosphonozirconacyclopentenes
作者:Shoshana Ben-Valid、Abed Al Aziz Quntar、Morris Srebnik
DOI:10.1021/jo047913m
日期:2005.4.1
bromination, iodination, allylation, and propargylation to generate unique vinyl boronates and vinylphosphonates not obtainable by other methods. The reaction proceeds in two steps, with both high regio- and stereoselectivity. With the vinyl boronates, the Zr−Csp2 bond is initially cleaved by 1 equiv of electrophile. With the phosphonates, either the Zr−Csp2 bond (allyl bromide, Br2) or the Zr−Csp3 bond (I2