3?-Substituted and 2?,3?-Unsaturated 7-Deazaguanine 2?,3?-Dideoxynucleosides: Syntheses and Inhibition of HIV-1 Reverse Transcriptase
作者:Frank Seela、Heinz-Peter Muth
DOI:10.1002/hlca.19910740517
日期:1991.8.7
silytation of 2-amino-4-chloro-7-(2-deoxy-β-D-erythro-pentofuranosyl)-7H-pyrrolo[2,3-d]pyrimidine (6) afforded 7, which gave the oxo-nucleoside 13 after oxidation with CrO3. NaBH4 reduction yielded 14 which, upon deprotection (Bu4NF) and nucieophific displacement, afforded 3 and 4. On the other hand, the N2-formyl derivative of 7 was mesylated ( 10), treated with Bu4NF, and deprotected with NH3 yielding
2',3'-二脱氧-2',3'-二氢-β-D-呋喃核糖苷1和2',3'-二脱氧-3'-氟-β-D-核糖呋喃糖苷5的合成描述了脱氮鸟嘌呤以及7-脱氮-2'-脱氧木糖苷(3)。还制备了相应的2,4-二氨基化合物2和4。因此,silytation 2-氨基-4-氯-7-(2-脱氧β-D-赤式-pentofuranosyl)-7- ħ吡咯并[2,3- d ]嘧啶(6),得到7,这给了氧CrO 3氧化后的β-核苷13。NaBH 4还原产生14脱保护(Bu 4 NF)和核转移后,得到3和4。另一方面,将7的N 2-甲酰基衍生物甲磺酸化(10),用Bu 4 NF处理,并用NH 3脱保护,得到2',3'-dideoxy-2',3'-didehydro-nucleoside 12,亲核置换反应在12产生1和2。氟核苷5是从NH 2基团进行甲氧基三苯甲基化反应后从14获得的(16),用DAST(17)氟化,并用2M