Synthesis of 2?,3?-dideoxynucleosides from 5-alkoxymethyluracils
摘要:
A modified synthesis of protected 2,3-dideoxyribose 5 starting from L-glutamic acid (1) is described. Reaction of 5 with silylated 5-hydroxymethyluracil 7 a and 5-alkoxymethyluracils 7 b-e in the presence of trimethylsilyl triflate afforded an anomeric mixture of 2',3'-dideoxyuridine derivatives 8 a-e and 9 a-e. Deprotection with methanolic ammonia and separation by chromatography gave the corresponding nucleosides 10 a-e and 11 a-e. Treatment of 9 b-e with tri(1H-1,2,4-triazol-1-yl) phosphine oxide and subsequent reaction of 12 b-e with ammonia in dioxane afforded the cytosine derivatives 13 b-e which on treatment with methanolic ammonia gave the corresponding 2',3'-dideoxycytidine derivatives 14 b-e and 15 b-e. In contrast with the parent compounds, these alkoxymethyl derivatives had no appreciable activity against human immunodeficiency virus (HIV-1).
ABDEL-MEGIED, AHMED E. -S.;PEDERSEN, ERIK B.;NIELSEN, CARSTEN M., MONATSH. CHEM., 122,(1991) N-2, C. 59-70
作者:ABDEL-MEGIED, AHMED E. -S.、PEDERSEN, ERIK B.、NIELSEN, CARSTEN M.
DOI:——
日期:——
Synthesis of 2?,3?-dideoxynucleosides from 5-alkoxymethyluracils
作者:Ahmed E. -S. Abdel-Megied、Erik B. Pedersen、Carsten M. Nielsen
DOI:10.1007/bf00815166
日期:——
A modified synthesis of protected 2,3-dideoxyribose 5 starting from L-glutamic acid (1) is described. Reaction of 5 with silylated 5-hydroxymethyluracil 7 a and 5-alkoxymethyluracils 7 b-e in the presence of trimethylsilyl triflate afforded an anomeric mixture of 2',3'-dideoxyuridine derivatives 8 a-e and 9 a-e. Deprotection with methanolic ammonia and separation by chromatography gave the corresponding nucleosides 10 a-e and 11 a-e. Treatment of 9 b-e with tri(1H-1,2,4-triazol-1-yl) phosphine oxide and subsequent reaction of 12 b-e with ammonia in dioxane afforded the cytosine derivatives 13 b-e which on treatment with methanolic ammonia gave the corresponding 2',3'-dideoxycytidine derivatives 14 b-e and 15 b-e. In contrast with the parent compounds, these alkoxymethyl derivatives had no appreciable activity against human immunodeficiency virus (HIV-1).