Pteridines. Part LXXXV. Chemical synthesis of deoxysepiapterin and 6-acylpteridines by acyl radical substitution reactions
作者:Ralph Baur、Takashi Sugimoto、Wolfgang Pfleiderer
DOI:10.1002/hlca.19880710305
日期:1988.5.4
A new synthesis of deoxysepiapterin (2), one of the two yellow eye pigments of the Drosophila mutant sepia, is described. The synthetic approach makes use of a homolytic nucleophilic acylation of 7-(alkylthio)pteridine derivatives (11, 13, 15, 18, 20) leading to the corresponding 6-acyl derivatives ( 21–27). Desulfurizations have been achieved for the first time in the pteridine series using Raney-Co
描述了一种新的合成方法,即果蝇突变体棕褐色的两种黄色眼色素之一,脱氧表皮蛋白(2)。合成方法利用7-(烷硫基)蝶啶衍生物(的均裂亲核酰化的11,13,15,18,20通向相应的6-酰基衍生物()21-27)。使用兰尼-Co,阮内-Cu或CuAl合金在碱性介质中在蝶啶系列中首次实现脱硫。除了裂解C(7)S键外,还检测到C(6)和C(7)N(8)键上的CO基团进一步减少,这是导致6-(1-羟烷基)的副反应(34, 35、42、43)和6-酰基-7,8-二氢衍生物(2,36,37),分别通过元素分析,p K测定,UV和1 H-NMR光谱对新合成的化合物进行了表征。