Regioselective O6-diphenylcarbamoylation of 7-deazaguanine derivatives via a stable intermediate 1-(diphenylcarbamoyl)-4-(dimethylamino)pyridinium chloride
作者:Natsuhisa Oka、Koki Nakano、Akane Fukuta、Kaori Ando
DOI:10.1016/j.tetlet.2020.152085
日期:2020.7
N2-pivaloyl-7-deazaguanine derivatives was achieved by using diphenylcarbamoyl chloride (DPC-Cl) and DMAP. The adduct of DPC-Cl and DMAP, 1-(diphenylcarbamoyl)-4-(dimethylamino)pyridinium chloride (DPC-DMAP), was isolated and fully characterized. DPC-DMAP is a stable, crystalline compound which is precipitated at ambient temperatures to stall the reaction. Upon heating, it reacts with the 6-carbonyl oxygen of N2-pi
通过使用二苯基氨基甲酰氯(DPC-Cl)和DMAP,在N 2-新戊酰基-7-脱氮鸟嘌呤衍生物的O 6位上进行区域选择性保护。分离并充分表征了DPC-Cl和DMAP的加合物1-(二苯基氨基甲酰基)-4-(二甲基氨基)吡啶鎓氯化物(DPC-DMAP)。DPC-DMAP是一种稳定的结晶化合物,在环境温度下会沉淀以阻止反应。加热时,它与N 2-新戊酰基-7-脱氮鸟嘌呤衍生物的6-羰基氧选择性地反应,从而实现完全的区域选择性反应。