Ambient Temperature Hydrophosphination of Internal, Unactivated Alkynes and Allenyl Phosphineoxides with Phosphine Borane Complexes

作者：Busacca Carl A^*; Farber Elisa; DeYoung Jay; Campbell Scot; Gonnella Nina C; Grinberg Nelu; Haddad Nizar; Lee Heewon; Ma Shengli; Reeves Diana; Shen Sherry; Senanayake Chris H

来源：Organic Letters, 2009, 11(24): 5594-5597.

DOI：10.1021/ol9022547

Phosphine boranes have been found to hydrophosphinate internal, unactivated alkynes at room temperature under basic conditions without the need for catalysts or radical initiators, The use of air-sensitive secondary phosphines is avoided in this facile process. Broad scope in both the phosphine borane and alkyne partners leads to excellent diversity in the phosphine products. Asymmetric hydrogenation of these species then provides one of the shortest possible routes to chiral monodentate phosphines, Hydrophosphination of allenyl phosphine oxides under similar conditions followed by hydrogenation of the exomethylene moiety yields a wide variety of bis-phosphine derivatives.

• 出版日期2009-12-17