The 4-azidobenzyloxycarbonyl function; application as a novel protecting group and potential prodrug modification for amines
作者:Roger J. Griffin、Elaine Evers、Richard Davison、Ashleigh E. Gibson、Deborah Layton、William J. Irwin
DOI:10.1039/p19960001205
日期:——
A series of 4-azidobenzylcarbamates [4-N3-C6H4-CH2-O-CO-N(H)-C6H4-X; X = H, Me, MeO, Br, Cl, NO2] have been prepared in good yield, and in high purity, by reaction of 4-azidobenzyl alcohol with the corresponding aryl isocyanate, or by displacement of 4-nitrophenol from 4-azidobenzyl-4-nitrophenylcarbonate by the appropriate amine. The 4-azidobenzylcarbamates were shown to undergo rapid reduction in the presence of dithiothreitol, and the resultant 4-aminobenzylcarbamates underwent immediate cascade degradation to release the target amine. The mild conditions used in this conversion may prove useful in the protection of amines during synthetic procedures or as a possible mode of bioactivation of prodrugs.
4-azidobenzylcarbamates [4-N3-C6H4-CH2-O-CO-N(H)-C6H4-X; X = H, Me, MeO, Br, Cl, NO2]系列的制备是通过 4-azidobenzyl alcohol 与相应的芳基异氰酸酯反应,或通过适当的胺从 4-azidobenzyl-4-nitrophenylcarbonate 中置换出 4-硝基苯酚,从而获得高产率和高纯度。研究表明,4-叠氮苄基氨基甲酸酯在二硫苏糖醇存在下会发生快速还原,生成的 4-氨基苄基氨基甲酸酯会立即发生级联降解,释放出目标胺。这种转化过程中使用的温和条件可能会被证明有助于在合成过程中保护胺,或作为原药生物活化的一种可能模式。