Heteroannulation of chromium carbene complexes. A novel and efficient pyrrole synthesis

V Dragisich, CK Murray, BP Warner…

Index: Dragisich, Vera; Murray, Christopher K.; Warner, Benjamin P.; Wulff, William D.; Yang, Dominic C. Journal of the American Chemical Society, 1990 , vol. 112, # 3 p. 1251 - 1253

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Citation Number: 38

Abstract

The annulations of a@-unsaturated carbene complexes of chromium with acetylenes have become the most synthetically useful reactions of Fischer carbene complexes, as indicated by their demonstrated applications in organic synthesis.* When the un-saturated substituent of the carbene ligand in 1 is an aryl group, either the five-or six-membered-ring annulation products are p~ ssible;~ however, for alkenyl complexes of the type 1, only six-membered- ...