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Synthesis of (E)-1,2-Diphosphanylethene Derivatives from Alkynes by Radical Addition of Tetraorganodiphosphane Generated In Situ

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  • This work was supported by Grants-in-Aid for Scientific Research, Young Scientists, and COE Research from the Ministry of Education, Culture, Sports, Science, and Technology, Japan. We thank Prof. Masaki Shimizu (Department of Material Chemistry, Kyoto University) and Dr. Yasuyuki Ura (Department of Energy and Hydrocarbon Chemistry, Kyoto University) for generous help with the X-ray crystallographic analysis and for teaching us how to purify air-sensitive compounds, respectively. We also acknowledge Mr. Hiroshi Hata and Prof. Naoki Aratani and Prof. Hiroshi Shinokubo (Department of Science, Kyoto University) for measuring UV/Vis and fluorescence spectra. Chlorodicyclohexylphosphane was a gift from Hokko Chemical Industry Co., Ltd.

Abstract

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E-infach radikalisch addieren: In Gegenwart von Triethylamin wird in situ aus einem Diorganophosphan und einem Chlordiorganophosphan ein Tetraorganodiphosphan erzeugt, das radikalisch an terminale Alkine addiert (siehe Schema) und die (E)-Diphosphanylethen-Derivate in hervorragenden Ausbeuten liefert. Unter den milden Reaktionsbedingungen werden zahlreiche funktionelle Gruppen toleriert.

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