Synthesis, X-ray structure and rearrangement of nitrogen ylides obtained upon alkyne and CO insertion reactions into aminocarbene complexes of chromium

H Rudler, A Parlier, R Goumont, JC Daran…

Index: Rudler, H.; Parlier, A.; Goumont, R.; Daran, J. C.; Vaissermann, J. Journal of the Chemical Society, Chemical Communications, 1991 , # 16 p. 1075 - 1077

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Citation Number: 5

Abstract

The aminocarbene complexes (CO) 5CrC (R1) N (R2R3) 1 [R1= H, Me, Ph, R2= Me, R2R3=(CH2) 5, R3= Me, cyclopropyl] react with diphenylacetylene to give nitrogen ylides 5 which were fully characterized by an X-ray analysis carried out on 5a [(CO) 3CrR2R3N (C16H10OR1)–(R1= H, R2= R3=(CH2) 5] and which lead, upon nitrogen to carbon migrations of alkyl groups R2 and R3, to the expected lactams (eg 8 and 9) ...