Synthesis of a novel cyclic sulfone dihydropyridine: An investigation of the isomerization reaction converting an exocyclic double bond isomer into a 1,4-dihydropyridine
作者:Christopher J. Fenk、Richard A. Conley、Gregory C. Lindabery、Stephen M. Stefanick、Thomas E. Royster、John H. Dodd、Charles F. Schwender
DOI:10.1002/jhet.5570310216
日期:1994.3
An eight membered cyclic sulfone 1,4-dihydropyridine, RWJ 22726, 1, with remarkable cardiovascular activity was prepared by isomerization of an exocyclic double bond isomer using various reaction conditions. Under acidic and thermal isomerization conditions, an equilibrium mixture of products in an optimum ratio of 1:3.5 in favor of the desired 1,4-dihydropyridine was obtained. Equilibration using
八元环状砜的1,4-二氢吡啶,RWJ 22726,1,具有显着的心血管活性的制备是通过环外双键的异构化的异构体使用各种反应条件。在酸性和热异构化条件下,获得了最佳比例为1:3.5,有利于所需的1,4-二氢吡啶的产物平衡混合物。使用基本反应条件的平衡无法实现。最终通过选择性沉淀所需异构体的盐酸盐最终实现在异构化反应过程中完全转化为1,4-二氢吡啶。