A simple and practical approach to the synthesis of the marine sponge pigment fascaplysin and related compounds
作者:Oleg S. Radchenko、Vyacheslav L. Novikov、George B. Elyakov
DOI:10.1016/s0040-4039(97)01167-2
日期:1997.7
Fascaplysin , an antimicrobial and cytotoxic red pigment of the marine sponge Fascaplys-inopsis sp., has been synthesized in five steps from tryptamine in 44% overall yield. The key steps in the synthesis are: (a) dehydrogenation of the dihydro-β-carboline intermediate simultaneously with its benzylic oxidation on treatment with MnO2 and (b) the thermal cyclization of the resulting β-carboline into
Fascaplysin ,一种海洋海绵Fascaplys-inopsis sp。的抗菌和细胞毒性红色颜料。由色胺经五步合成,总收率为44%。合成中的关键步骤是:(a)在用MnO 2处理的同时使二氢-β-咔啉中间体脱氢并进行苄基氧化,以及(b)将所得的β-咔啉热环化为季盐。同样,吲哚异喹啉和的四环类似物是从α-氨基酮分六步制备的,总收率分别为59%和55%。