4b and 5b afforded guanine analogues 4c and 5c. Composition of products (except 14b) obtained from alkylation-elimination reflects thermodynamically controlled cyclopropene-methylenecyclopropene rearrangement. The E-isomer 4a was moderately active against human cytomegalovirus and along with the Z-isomer 5a was active against leukemia L1210 and solid tumors in vitro.
                                    用宝石-二
氟环丙烷二
溴化物10烷基化消除
腺嘌呤和
2-氨基-6-氯嘌呤,得到E-和Z-亚甲基-宝石-二
氟环丙烷11a,11b,12a和12b以及宝石-二
氟环
丙烯13a和13b。中间体11a,11b,12a和12b的脱苄基作用得到E-和Z-
亚甲基环丙烷4a,4b,5a和5b。
2-氨基-6-氯嘌呤衍
生物4b和5b的
水解得到
鸟嘌呤类似物4c和5c。由烷基化消除获得的产物(14b除外)的组成反映了热力学控制的环
丙烯-
亚甲基环丙烯重排。E-异构体4a在体外对人巨细胞病毒具有中等活性,而Z-异构体5a在体外对L1210白血病和实体瘤具有活性。