Asymmetric Synthesis of Arylglycines and Their Use as Chiral Templates for the Stereocontrolled Synthesis of 7,8-Disubstituted 3-Aryl-1,2,3,4-tetrahydroisoquinolin-4-ols
作者:Eneritz Anakabe、Jose L. Vicario、Dolores Badía、Luisa Carrillo、Victoria Yoldi
DOI:10.1002/1099-0690(200111)2001:22<4343::aid-ejoc4343>3.0.co;2-d
日期:2001.11
obtained turned out to be excellent chiral templates for the production of chiral, nonracemic 7,8-disubstituted 3-aryl-1,2,3,4-tetrahydroisoquinolines, through use of a synthetic sequence involving: (1) reduction of the arylglycines to the parent arylglycinols, (2) N-benzylation with appropriately substituted aromatic aldehydes and (3) Swern oxidation followed by acid-catalysed cyclization of the obtained
一种用于不对称合成芳基甘氨酸的合成技术已得到优化,只需四步即可达到目标氨基酸,收率良好,对映体过量超过 99%。关键步骤包括基于 (S,S)-(+)-伪麻黄碱的芳基乙酰胺烯醇化物与二叔丁基偶氮二羧酸酯的立体控制的亲电胺化反应。由此获得的芳基甘氨酸被证明是用于生产手性非外消旋 7,8-二取代 3-芳基-1,2,3,4-四氢异喹啉的极好手性模板,通过使用合成序列,包括:(1)还原将芳基甘氨酸转化为母体芳基甘氨醇,(2) 用适当取代的芳香醛进行 N-苄基化和 (3) Swern 氧化,然后酸催化所得 α-氨基醛的环化。