铑
化学
烯烃
选择性
炔烃
催化作用
同种类的
均相催化
摩尔比
催化加氢
有机化学
药物化学
物理
热力学
作者
Nora Jannsen,Cornelia Pribbenow,Carmen Selle,Hans‐Joachim Drexler,Marc‐André Müller,Jonathan Medlock,Werner Bonrath,Detlef Heller
标识
DOI:10.1002/adsc.202300842
摘要
Abstract An efficient and highly selective semi‐hydrogenation of terminal alkynes to alkenes using neutral dimeric rhodium(I) complexes of the type [Rh( μ ‐Cl)(PP)] 2 is presented. Dehydroisophytol (DIP) was chosen as the alkyne for this study because of its high importance in the industrial production of synthetic vitamin E. Excellent selectivity of over 91% towards the alkene was achieved with known and new rhodium catalysts. No deactivation was observed for the [Rh( μ ‐Cl)(PP)] 2 complexes and the molar Rh:DIP ratio could be increased to 1:20 000, and importantly, no reduction in selectivity was observed. The results presented open the door to the industrial application of homogeneous rhodium complexes in the semi‐hydrogenation of terminal alkynes.
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