Push–pull alkenes by reacting N, N′-dimethyl cyclic ketene N, N′-acetals with isocyanates: synthesis, structures, and reactivities

G Ye, WP Henry, C Chen, A Zhou, CU Pittman

Index: Ye, Guozhong; Henry, William P.; Chen, Chunlong; Zhou, Aihua; Pittman Jr., Charles U. Tetrahedron Letters, 2009 , vol. 50, # 18 p. 2135 - 2139

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Citation Number: 20

Abstract

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.