Controlling stereoselectivity by enzymatic and chemical means to access enantiomerically pure (1S,3R)-1-benzyl-2,3-dimethyl-1,2,3,4-tetrahydroisoquinoline derivatives
作者:Alejandro A. Orden、Joerg H. Schrittwieser、Verena Resch、Francesco G. Mutti、Wolfgang Kroutil
DOI:10.1016/j.tetasy.2013.05.003
日期:2013.6
A chemoenzymatic strategy for the synthesis of enantiomerically pure novel alkaloids (1S,3R)-1-benzyl-2,3-dimethyl-1,2,3,4-tetrahydroisoquinolines is presented. The key steps are the biocatalytic stereoselective reductive amination of substituted 1-phenylpropan-2-one derivatives to yield chiral amines employing microbial omega-transaminases, and the diastereoselective reduction of a Bischler-Napieralski
介绍了合成对映体纯的新型生物碱 (1S,3R)-1-benzyl-2,3-二甲基-1,2,3,4-四氢异喹啉的化学酶促策略。关键步骤是使用微生物 omega-转氨酶对取代的 1-苯基丙烷-2-酮衍生物进行生物催化立体选择性还原胺化以产生手性胺,以及在炭上钯存在下通过催化氢化对 Bischler-Napieralski 亚胺中间体进行非对映选择性还原,专门导致所需的顺式异构体。