Push–pull alkenes by reacting N,N′-dimethyl cyclic ketene N,N′-acetals with isocyanates: synthesis, structures, and reactivities
作者:Guozhong Ye、William P. Henry、Chunlong Chen、Aihua Zhou、Charles U. Pittman
DOI:10.1016/j.tetlet.2009.02.160
日期:2009.5
N,N′-Dimethyl cyclic ketene N,N′-acetals react with two or three equivalents of isocyanates to generate tetrasubstituted push–pull alkene derivatives in one-pot sequential reactions. X-ray crystallography showed significant elongations and out of plane distorsions of the polarized carbon–carbon double bonds.