Amino Acids as a Chiral Pool: Synthesis of (<i>S</i>)‐and (<i>R</i>)‐2‐<i>N</i>‐Carbomethoxy‐5‐aminoindane from (<i>S</i>)‐ and (<i>R</i>)‐Phenylalanines
作者:Liladhar M. Waykole、Joseph J. McKenna、Andrew Bach、Mahavir Prashad、Oljan Repič、Thomas J. Blacklock
DOI:10.1080/00397910701226905
日期:2007.5
Abstract Enantioselective syntheses of (R)‐and (S)‐2‐N‐carbomethoxy‐5‐aminoindanes from (R)‐ and (S)‐phenylalanines, respectively, are described. A Friedel–Crafts reaction employing N‐carbomethoxy phenylalanine leads to chiral 2‐N‐carbomethoxy‐1‐indanone, which is diastereoselectively reduced to 1‐hydroxy‐2‐N‐carbomethoxyindane. After protection of the hydroxyl group, a regioselective nitration gives
摘要描述了分别由 (R)- 和 (S)-苯丙氨酸对映选择性合成 (R)- 和 (S)-2-N-carbomethoxy-5-aminoindanes。使用 N-碳甲氧基苯丙氨酸的 Friedel-Crafts 反应生成手性 2-N-碳甲氧基-1-茚满酮,其被非对映选择性还原为 1-羟基-2-N-碳甲氧基茚满。羟基保护后,区域选择性硝化得到 6-硝基茚满中间体,加氢后得到 (R)-或 (S)-2-N-碳甲氧基-5-氨基茚满。