The Atropo-Enantioselective Ring Opening of Achiral Lactone-Bridged Biaryls Using Chirally Modified Aluminum Hydrides
作者:Gerhard Bringmann、Thomas Hartung
DOI:10.1055/s-1992-26126
日期:——
The atropo-enantioselective preparation of the chiral biaryl 2-hydroxymethyl-1-(2-hydroxy-4, 6-dimethoxyphenyl)naphthalene (7) from 1,3-dimethoxy-6H-benzo [b]naphtho[1,2-d]pyran-6-one (3) is described, whereby two formal problems of stereoselective biaryl synthesis are independently solved: The carbon-carbon bond formation by the intramolecular aryl coupling of the ester-type prefixed aromatic halves, and the asymmetric induction at the pre-formed biaryl axis by the subsequent stereoselective ring-opening reaction, using chiral hydrogen nucleophiles.
本研究描述了从 1,3 二甲基氧-6H-苯并 [b]萘并[1,2-d]吡喃-6-酮 (3) 手性 2-羟甲基-1-(2-羟基-4, 6-二甲氧基苯基)萘 (7) 的异丙烯-对映体选择性制备方法,从而独立解决了立体选择性双芳基合成的两个形式问题:利用手性氢亲核物,通过酯型预固定芳香半边的分子内芳基偶联形成碳-碳键,并通过随后的立体选择性开环反应在预形成的双芳基轴上进行不对称诱导。