作者:Tomoyuki Onishi、Toshihiro Matsuzawa、Seiichi Nishi、Takashi Tsuji
DOI:10.1016/s0040-4039(99)01858-4
日期:1999.12
(1′S,2′R)-9-[[1′,2′-bis(hydroxymethyl)cycloprop-1′-yl]methyl]guanine (A-5021, 1) was synthesized from optically active cyclopropane lactone 2 by employing: (1) selective reduction of the ester; (2) alkylation of 2-amino-6-chloropurine; and (3) reductive opening of the lactone ring. This route eliminates the protection steps to give 1 in a good yield and is of practical value.
(1'小号,2' - [R)-9 - [[1',2'-双(羟甲基)环丙-1'-基]甲基]鸟嘌呤(A-5021,1)从光学活性的环丙烷内酯合成2通过使用:(1)选择性还原酯;(2)2-氨基-6-氯嘌呤的烷基化;(3)内酯环的还原性打开。该路线省去了保护步骤,从而以良好的收率得到1,具有实用价值。