Rhodium-catalyzed asymmetric hydrogenation of β-cyanocinnamic esters with the assistance of a single hydrogen bond in a precise position
作者:Xiuxiu Li、Cai You、Yusheng Yang、Yuhong Yang、Pan Li、Guoxian Gu、Lung Wa Chung、Hui Lv、Xumu Zhang
DOI:10.1039/c7sc04639a
日期:——
With the assistance of hydrogen bonds, the first asymmetric hydrogenation of β-cyanocinnamic esters is developed, affording chiral β-cyano esters with excellent enantioselectivities (up to 99% ee). This novel methodology provides an efficient and concise synthetic route to chiral GABA-derivatives such as (S)-Pregabalin, (R)-Phenibut, (R)-Baclofen. Interestingly, in this system, the catalyst with a
在氢键的帮助下,首次开发了 β-氰基肉桂酸酯的不对称氢化,提供了具有优异对映选择性(高达 99% ee)的手性 β-氰基酯。这种新的方法为手性 GABA 衍生物(如 ( S )-普瑞巴林、( R )-Phenibut、( R )-巴氯芬)提供了一种有效且简洁的合成途径。有趣的是,在该体系中,单氢键供体催化剂的性能优于双氢键供体,这是金属有机催化领域的一个新发现。