Stereoselective synthesis of C-4′-aminouridines (uracil C-4-amino-D-ribonucleosides)
作者:Masataka Yokoyama、Taku Ikenogami、Hideo Togo
DOI:10.1039/b002063j
日期:——
The first C-4â²-aminouridines can be synthesized in an α,β-stereoselective manner starting from L-glutamic acid. For the synthesis of α-C-4â²-aminouridine, a key compound 9 is cyclized with trifluoroacetic acid followed by reduction with NaBH3CN, while 9 is reduced with NaBH4 followed by mesylation to give β-C-4â²-aminouridine. Further, an acetonide-protection method is preferred for the synthesis of α-C-4â²-aminouridine.
第一种C-4′-氨基尿苷可以从L-谷氨酸以α,β-立体选择性的方式合成。对于α-C-4′-氨基尿苷的合成,关键化合物9与三氟乙酸环化,然后用NaBH3CN还原,而9则用NaBH4还原后进行美克化反应,得到β-C-4′-氨基尿苷。此外,在合成α-C-4′-氨基尿苷时,更倾向于使用醋酮保护方法。