A facile synthesis of 1,2,3,4-tetrahydroisoquinolines through cyclization of O,N-acetals. II. Syntheses of isoquinolinequinone antibiotics.
作者:Naoki SAITO、Nanko KAWAKAMI、Eri YAMADA、Akinori KUBO
DOI:10.1248/cpb.37.1493
日期:——
A mild and effecient method for the synthesis of 1, 2, 3, 4-tetrahydroisoquinolines 3a-c and 9 by a modified Pictet-Spengler reaction involving Lewis acid-mediated cyclization of the O, N-acetals 2a-c and 8 is described. The synthetic urility of this reaction is demonstrated with a preparation of two isoquinolinequinone antibiotics, renierone (11) and mimocin (12), from the ester 3c.
本文描述了一种温和高效的方法,通过改良的Pictet-Spengler反应合成1,2,3,4-四氢异喹啉3a-c和9,该反应涉及Lewis酸催化的O,N-乙缩醛2a-c和8的环化。通过从酯3c制备两种异喹啉醌抗生素——雷尼替酮(11)和米诺辛(12),展示了此反应的合成实用性。