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。