Calcium-mediated hydrophosphination of diphenylethyne and diphenylbutadiyne as well as crystal structure of 1,4-diphenyl-1,4-bis(diphenylphosphanyl)buta-1,3-diene

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• 作者：Tareq M.A. Al-Shboul ; Helmar Gö ; rls ; Matthias Westerhausen
• 关键词：Calcium ; Catalysis ; Hydrophosphination ; Phosphanides ; Addition reactions
• 刊名：Inorganic Chemistry Communications
• 出版年：2008
• 出版时间：December 2008
• 年：2008
• 卷：11
• 期：12
• 页码：1419-1421
• 全文大小：219 K

文摘

Hydrophosphination reactions of phenyl substituted alkynes are catalyzed effectively by [(thf)₄Ca(PPh₂)₂] (1). The reactions of diphenylethyne and diphenylbutadiyne with diphenylphosphane in THF in the presence of catalytic amounts of 1 (approx. 5 mol % ) yield quantitatively the cis-addition products trans-1,2-diphenyl-1-diphenylphosphanylethene (2) and 1,4-diphenyl-1,4-bis(diphenylphosphanyl)buta-1,3-diene (3), respectively. The phenyl groups in 3 are oriented nearly perpendicular to the butadiene backbone and therefore, the π-systems of the phenyl groups and the butadiene unit show no interaction with each other.