Chemische Berichte

Cycloadditions, 43 [1]. Cyclobutanones via Photoreactions of Chromium??Carbene Complexes with Olefins and Dienes–A Comparison with the Traditional Ketene …

S Köbbing, J Mattay, G Raabe

文献索引：Koebbing, Stephan; Mattay, Jochen; Raabe, Gerhard Chemische Berichte, 1993 , vol. 126, # 8 p. 1849 - 1858

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被引用次数: 12

摘要

Abstract Photolysis of chromium-carbene complexes 1 in the presence of olefins and dienes yields cyclobutanones 4 and 5 with varying stereoselectivity. Under oxidative conditions lactones 6, 7, 8, and 10 are obtained as byproducts. Thermal reactions of ketenes 3 with olefins and dienes yield the same cyclobutanones with usually equal selectivities. In the case of 2, 3-dihydro-1, 4-dioxin as olefin, diene 9 is obtained as a byproduct. ...