An efficient synthesis of substituted isoxazolopyrroloisoquinolines via diastereoselective N-acyliminium ion cyclization
作者:Maria S. Ledovskaya、Alexander P. Molchanov、Vitaly M. Boitsov、Rafael R. Kostikov、Alexander V. Stepakov
DOI:10.1016/j.tet.2015.02.031
日期:2015.4
A simple and efficient strategy was developed for the synthesis of fused pyrrolo[2,1-a]isoquinoline ring systems. The 5- and 6-substituted isoxazolopyrroloisoquinolines were readily prepared via diastereoselective N-acyliminium ion cyclization of 5-(1-R(or 2-R)-substituted-2-phenylethyl)-6-hydroxytetrahydro-4H-pyrrolo[3,4-d]isoxazol-4-ones derived from the corresponding bicyclic dihydroisoxazoles.
开发了一种简单有效的策略来合成稠合的吡咯并[2,1- a ]异喹啉环系统。通过5-(1- R(或2- R)-取代的-2-苯基乙基)-6-羟基四氢-4 H-吡咯并[8,]的非对映选择性N-酰基离子环化反应,可以轻松制备5-和6-取代的异恶唑并吡咯并异喹啉[3, 4- d ]从相应的双环dihydroisoxazoles衍生异恶唑-4-酮。