Journal of the American Chemical Society

1, 3-Dipolar cycloaddition reactions of transition-metal carbene complexes and the formal [3+ 2+ 1] pyridinannulation of the cycloadducts

KS Chan, WD Wulff

Index: Chan, Kin Shing; Wulff, William D. Journal of the American Chemical Society, 1986 , vol. 108, # 17 p. 5229 - 5236

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Citation Number: 88

Abstract

Abstract: The first examples of 1, 3-dipolar cycloadditions of a&unsaturated carbene complexes are described. The reaction of alkynylcarbene complexes with diazomethane gives a mixture of two products. The first arises from a [3+ 21 cycloaddition on the carbon- carbon triple bond of the alkynyl complex to give a pyrazole carbene complex and the second is most likely a secondary product which arises from attack of diazomethane on ...