Synthesis of 2-substituted adenine-arabinosides and related compounds from 5-amino-4-cyano-1-(.BETA.-d-ribofuranosyl)imidazole.
作者:Yoshiko SATO、Tokumi MARUYAMA、Mikio HONJO
DOI:10.1248/cpb.37.1604
日期:——
Triflation of the N5-benzylidene-3', 5'-O-silyl protected 5-amino-4-cyano-1-(β-D-ribofuranosyl)imidazole (AICN-riboside) (IIb), followed by nucleophilic displacement with OAc- and N3-provided the corresponding 2'(S)-substituted derivatives (VIIa, VIIb). Deprotection of the silyl and benzylidene groups of VIIa, followed by hydrolysis of the acetyl group gave AICN-arabinoside (IXc). Reaction of IXc with alkyl, aryl and aralkyl nitriles afforded the corresponding 2-substituted adenine-arabinosides (XIa-e). The 2'-azido (Xa) and 2'-amino (Xb) analogs of XIa were similarly prepared.
N5-苄亚基-3', 5'-O-硅保护5-氨基-4-氰基-1-(β-D-核糖基)咪唑(AICN-核苷)(IIb)的三氟化反应,随后与OAc和N3进行亲核取代,得到相应的2'(S)-取代衍生物(VIIa,VIIb)。去保护VIIa中的硅基和苄亚基,随后水解乙酰基,得到AICN-阿拉伯糖苷(IXc)。IXc与烷基、芳基和芳烷基氰化物反应,得到相应的2-取代腺苷-阿拉伯糖苷(XIa-e)。XIa的2'-叠氮(Xa)和2'-氨基(Xb)类似物也以类似方式制备。