作者:Carl A. Busacca、Jon C. Lorenz、Nelu Grinberg、Nizar Haddad、Heewon Lee、Zhibin Li、Mary Liang、Diana Reeves、Anjan Saha、Rich Varsolona、Chris H. Senanayake
DOI:10.1021/ol7028542
日期:2008.1.1
structure has led to the development of chiral rhodium catalysts capable of producing the targets with >99% ee. The critical phosphine borane SNAr reaction needed for ligand synthesis has been optimized to give the adducts in high yield at ambient temperature with no racemization. An extremely concise, economical, and scalable sequence to these important new ligands for catalysis of asymmetric hydrogenation
已经研究了用BIPI配体不饱和脲酯的不对称氢化。PN配体结构的优化导致手性铑催化剂的开发,该催化剂能够生产ee大于99%的靶标。已优化了配体合成所需的关键膦硼烷SNAr反应,以在环境温度下高收率且无外消旋作用的情况下获得高收率的加合物。已经开发出了对于这些重要的新配体的极其简明,经济和可扩展的序列,用于催化不对称氢化。