An unusual by-product in a concise synthesis of a rotationally restricted phenolic analog of serotonin
作者:John E. Macor
DOI:10.1016/0040-4039(95)01453-o
日期:1995.9
An improved synthesis of a dihydropyrano[3,-2e]indole analog (4, CP-123,479) of serotonin has been accomplished. Starting with serotonin itself and utilizing a Claisen rearrangement/cyclization of a 5-propargyloxy-N-Cbz-tryptamine (2) to form the pyrano[3,2-e]indole in 3, the reaction sequence of four steps afforded a 36% overall yield of 4. In the conversion of 2 to 3, a unique tetracyclic by-product
已完成5-羟色胺的二氢吡喃并[3,-2e]吲哚类似物(4,CP-123,479)的改进合成。从5-羟色胺本身开始,并利用5-炔丙基氧基-N-Cbz-色胺(2)的克莱森重排/环化反应,以3的形式形成吡喃并[3,2-e]吲哚,四步反应得到的收率为36%总产率为4。在2至3的转化中,观察到独特的四环副产物(5),其由Cbz基团的-NH-生成,并横跨所形成的吡喃并[3,2-e]吲哚中的烯烃。从5到叔胺(6)的转化增加了对四环结构鉴定的确认。