9-Methylsulfanyl pyridine-stretched adenine and hypoxanthine derivatives have been prepared via regioselective reaction of a 5-aminoimidazole with 2-(bis-methylsulfanylmethylene)malononitrile [(NC)2C=C(SMe)2]. The 9-methylsulfanyl substituent can be replaced by sequential oxidation and substitution by nucleophiles including amines. 5-aminoimidazoles - lin-pyridoadenines - soft electrophiles - tricyclic
通过5-氨基咪唑与2-(双-甲基硫烷基亚甲基)丙二腈[(NC)2 C = C(SMe)2 ]的区域选择性反应已经制备了9-甲基亚硫酰基吡啶伸展的腺嘌呤和次黄嘌呤衍生物。9-甲基硫烷基取代基可以被顺序的氧化取代,并被包括胺的亲核试剂取代。 5-氨基咪唑-林-pyridoadenines -软亲电-三环杂环-吡啶拉伸嘌呤
Synthesis of Pyridine-stretched 2′-Deoxynucleosides
作者:William Fraser、Christopher A. Ramsden、Russell Clayton、Michael L. Davis、Wei Li
DOI:10.1055/s-2002-33505
日期:——
Synthesis of novel pyridine-stretched nucleoside (PSN) analogues of adenine (strA) (1), 2,6-diaminopurine (strD) (15) and hypoxanthine (strH) (17) from 4(5)-nitroimidazole has been achieved. Glycosylation of 4(5)-nitroimidazole was optimized to give consistently good yields (>70%) of the desired analytically pure 5-nitro-1′-β isomer 8 which on hydrogenation, C-addition of ethoxymethylene malononitrile