作者:J. H. Jones、D. L. Rathbone、P. B. Wyatt
DOI:10.1055/s-1987-28187
日期:——
Further work on the regiospecific alkylation of histidine and imidazole derivatives is reported, including convenient preparations of N(α)-benzyloxycarbonyl-N(Ï)-benzyl-L-histidine and N(α)-benzyloxycarbonyl-N(Ï)-benzyloxymethyl-L-histidine, and a sequence of reactions enabling controlled exclusive alkylation of the least hindered im-nitrogen (tritylation, phenacylation, detritylation, alkylation, and finally dephenacylation with zinc/acetic acid) in 4(5)-alkylimidazoles.
报道了组氨酸和咪唑衍生物的区域特异性烷基化的进一步工作,包括 N(α)-苄氧基羰基-N(α)-苄基-L-组氨酸和 N(α)-苄氧基羰基-N(α) 的方便制备)-苄氧基甲基-L-组氨酸,以及一系列反应,能够在 4(5)-烷基咪唑中对最小受阻的氮进行受控排他烷基化(三苯甲基化、苯酰化、去三苯甲基化、烷基化,最后用锌/乙酸进行去苯酰化)。