Bis(4,5-dimethoxy-2-nitrophenyl)ethylene glycol: a new and efficient photolabile protecting group for aldehydes and ketones
作者:Srinivas Kantevari、Ch. Venkata Narasimhaji、Hari Babu Mereyala
DOI:10.1016/j.tet.2005.04.007
日期:2005.6
Synthesis of a new photolabile protecting group, bis(4,5-dimethoxy-2-nitrophenyl)ethylene glycol (4) from 4,5-dimethoxy-2-nitrobenzyl alcohol in three steps in good yields is described. The acetals and ketals of 4 are stable against acidic and basic reaction conditions and are cleaved smoothly on irradiation at 350 and 400 nm with regeneration of carbonyl compounds in high yields and efficiency.
描述了由4,5-二甲氧基-2-硝基苄基醇以良好的产率合成新的光不稳定保护基,双(4,5-二甲氧基-2-硝基苯基)乙二醇(4)。的缩醛和缩酮4是对酸性和碱性反应条件稳定而平滑地在照射在350和400nm用在高收率和效率的羰基化合物的再生裂解。