作者:Suzanne M. Ruder、Min Ding
DOI:10.1039/b000014k
日期:——
Highly substituted cyclic β-alkoxyvinyl phosphonates underwent thermal [2+2] cycloaddition with activated ketenes to afford bicyclic phosphonates. Fragmentation of the central polarized bond of this bicyclic system occurred readily upon treatment with zinc in acetic acid, to give rise to ring expanded products. This method provides access to cycloheptane-1,3-diones substituted at the 4-position with
对高度取代的环状β-烷氧基乙烯基膦酸酯进行热解 [2 + 2]环加成 与激活 烯酮 负担双环 膦酸酯。用锌处理后,该双环系统的中心极化键容易发生断裂。醋酸,以产生扩环产品。该方法提供了在4-位被膦酸酯基团取代的环庚烷-1,3-二酮的途径。