Syntheses of σ-cyclobut-1-en-3-onyl complexes by cycloaddition of ketenes to some transition metal alkynyl complexes期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Syntheses of σ-cyclobut-1-en-3-onyl complexes by cycloaddition of ketenes to some transition metal alkynyl complexes

Authors:	Pangbu Hong Kenkichi Sonogashira Nobue Hagihara

Institution:	The Institute of Physical and Chemical Research, Wako-shi, Saitama 351 Japan;The Institute of Scientific and Industrial Research, Osaka University, Suita, Osaka 565 Japan

Abstract:	Reactions of ketenes (R¹R²CCO) with (η⁵-C₅H₅)Ni(PPh₃)CCR (I) and (η⁵-C₅H₅)Fe(CO)(L)CCR (III, L = CO and PPh₃) give σ-cyclobut-1-en-3-onyl complexes, {(η⁵-C₅H₅)Ni(PPh₃) $CC(R)COC$ }R¹R² (VI) and (η⁵-C₅H₅)Fe(CO)(L) $CC(R)COC$ R¹R² (IX)}, (2 + 2) cycloaddition products, in good yields. The σ-cyclobutenonyl complexes also can be prepared by the reaction of I and III with acyl chlorides in the presence of triethylamine.

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