Fluorinated Alkynylphosphonates in<i>C</i>,<i>C</i>-Cyclizations: Regioselective Formation of Polysubstituted Fluorinated Arylphosphonates
作者:Blazej Duda、Sergey N. Tverdomed、Boris I. Ionin、Gerd-Volker Röschenthaler
DOI:10.1002/ejoc.201402188
日期:2014.6
The regioselective C,C-cyclization of selected 1,4-bipolar substrates with fluorinated alkynylphosphonates provided polysubstituted benzenes and naphthalenes in up to 98 % yield. For the case in which tetraethyl ethynylbisphosphonate was used, an unexpected phosphonate–phosphoramidate rearrangement was, for the first time, observed, which occurred in excellent yield.
选定的 1,4-双极底物与氟化炔基膦酸酯的区域选择性 C,C-环化以高达 98% 的产率提供多取代苯和萘。对于使用乙炔基双膦酸四乙酯的情况,首次观察到意外的膦酸-氨基磷酸酯重排,其产率非常好。