Tetrahedron letters

The in situ generation of non-stabilized carbene complexes viaintramolecular acetylene insertion: A new two-alkyne annulation and a new preparation of γ-keto esters

WD Wulff, YC Xu

Index: Wulff, William D.; Xu, Yao-Chang Tetrahedron Letters, 1988 , vol. 29, # 4 p. 415 - 418

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Citation Number: 13

Abstract

Abstract Non-heteroatom stabilized carbene complexes can be generated in solution by mild thermolysis (50 C) of 4-hexynyl and 5-heptynyl (methoxymethylene) complexes of chromium and tungsten pentacarbonyl. These intermediates react with acetylenes to give a

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