Application of the addition of triorganozincates to N-(tert-butanesulfinyl)imines to the enantioselective synthesis of α-amino acids
作者:Raquel Almansa、David Guijarro、Miguel Yus
DOI:10.1016/j.tetlet.2009.05.008
日期:2009.7
Highly enantiomerically enriched N-protected α-amino acids can be easily prepared from optically pure N-(tert-butanesulfinyl)imines by a four-step sequence involving: diastereoselective addition of a triorganozincate to the imine, removal of the sulfinyl group, benzoylation of the nitrogen atom of the obtained primary amine and oxidation of one of the substituents on the carbon atom α to the nitrogen
高度对映体富集的N-保护的α-氨基酸可以很容易地由光学纯的N-(叔丁烷亚磺酰基)亚胺通过以下四个步骤序列制得:非对映选择性地向亚胺中添加三有机锌,亚磺酰基的去除,苯甲酰基的苯甲酰化获得的伯胺的氮原子被碳原子α上的取代基之一氧化成氮。在亚磺酰基手性助剂中使用相同的配置,具有(R)或(S可以通过选择亚胺和有机锌酸盐的适当组合来制备构型。具有高光学纯度的α,α-二取代的α-氨基酯也可以通过将三烷基锌酸酯非对映选择性地加成到α-亚氨基酯中来制备。