Nucleosides. CXLIV. Some reactions of 2'-O-triflyl-2,3'-anhydroxylosyluracil with nucleophilic reagents. Synthesis of 2'-chloro-2',3'-dideoxyuridinene. Studies directed toward the synthesis of 2'-deoxy-2'-substituted arabino nucleosides.
作者:KRZYSZTOF W. PANKIEWICZ、KYOICHI A. WATANABE
DOI:10.1248/cpb.35.4498
日期:——
Treatment of 2, 3 '-anhydro-1- (5-Ο-acetyl-2-Ο-triflyl-β-D-xylofuranosyl) uracil with LiCl in hexamethylphosphoric triamide afforded the 2 '- “up” chloride of the anhydronucleoside, i.e., the 2'-triflate group was directly displaced by the chloride nucleophile. All attempts to hydrolyze the 2, 3'-anhydro linkage resulted in the formation of 2'-chloro-2', 3'-didehydro-dideoxynucleoside.
在六甲基
磷三酰胺中用 LiCl 处理 2, 3'-脱
水-1-(5-O-乙酰基-2-O-三
氟甲基-β-D-木
呋喃糖基)尿
嘧啶,得到脱
水核苷的 2'-“上”
氯化物,即,2'-
三氟甲磺酸酯基团直接被
氯化物亲核试剂取代。所有
水解 2, 3'-脱
水键的尝试都会导致 2'-
氯-2', 3'-二脱氢-二脱氧核苷的形成。