Synthesis of Substituted 2,3-Dihydro-1H-2-benzazepines and 1,2-Dihydroisoquinolines Using an Isomerization-Ring-Closing Metathesis Strategy: Scope and Limitations
作者:Jenny-Lee Panayides、Rakhi Pathak、Charles B. de Koning、Willem A. L. van Otterlo
DOI:10.1002/ejoc.200700473
日期:2007.10
synthesis of substituted 2,3-dihydro-1H-2-benzazepines and 1,2-dihydroisoquinolines. The 2,3-dihydro-1H-2-benzazepines were obtained from N-protected N-2-[(1E)-prop-1-en-1-yl]benzyl}prop-2-en-1-amines by RCM reaction. A double isomerisation reaction on the N-protected N-(2-allylbenzyl)prop-2-en-1-amines and a subsequent RCM afforded the substituted 1,2-dihydroisoquinolines. Finally, a selective isomerization
异构化闭环复分解 (RCM) 方法用于合成取代的 2,3-二氢-1H-2-苯并氮杂和 1,2-二氢异喹啉。2,3-二氢-1H-2-苯并氮杂是从N-保护的N-2-[(1E)-prop-1-en-1-yl]benzyl}prop-2-en-1-胺获得的RCM 反应。N-保护的N-(2-烯丙基苄基)prop-2-en-1-胺和随后的RCM的双异构化反应提供取代的1,2-二氢异喹啉。最后,N-保护的 N-(2-烯丙基苄基)prop-2-en-1-胺的烯丙胺基团通过 [RuClH(CO)(PPh3)3] 的选择性异构化,然后是 RCM,没有提供预期的2,5-二氢-1H-2-苯并氮杂,但通过原料的脱烯基化和异构化得到产物。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)