Asymmetric Hydrogenation of Unsaturated Ureas with the BIPI Ligands
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 importantnew ligands for catalysis of asymmetric hydrogenation
Disclosed are processes of making dipeptide compounds of formula(I) as further described in the detailed description section:
本发明揭示了制备式(I)的二肽化合物的过程,详细描述见详细说明部分:
Electronically Tuned Ligands For Asymmetric Hydrogenation
申请人:Busacca Carl Alan
公开号:US20100041898A1
公开(公告)日:2010-02-18
Disclosed is a new class of chiral bidentate ligands capable of performing asymmetric hydrogenation. Also disclosed are processes of performing asymmetric hydrogenation the chiral bidentate ligands.