7-SUBSTITUTED 8-AZA-7-DEAZAPURINES AND 2,8-DIAZA-7-DEAZA-PURINES: SYNTHESIS OF NUCLEOSIDES AND OLIGONUCLEOTIDES
摘要:
7-Substituted 8-aza-7-deazaadenosines la-e were synthesized by Sonogashira cross coupling from the corresponding 7-iodo nucleoside in 36- 79% yields. Starting from 7-bromo (or 7-iodo)-8-aza- 7-deazaadenine, 2a,b were obtained by acid-catalyzed glycosylation followed by deprotection in 53 and 35% yields, respectively. Compounds 2b was applied to cross coupling reaction to give 2c-d in 34-95% yield. Compounds 2a and 4b were further transformed to the phosphoramidites 5 and 6b in 9 and 49% overall yields, which were incorporated into oligonucleotides.
[EN] PYRROLOTRIAZINONE DERIVATIVES AS PI3K INHIBITORS<br/>[FR] DÉRIVÉS DE PYRROLOTRIAZINONE EN TANT QU'INHIBITEURS DES PI3K
申请人:ALMIRALL SA
公开号:WO2014060431A1
公开(公告)日:2014-04-24
New pyrrolotriazinone derivatives having the chemical structure of formula (I) are disclosed; as well as process for their preparation, pharmaceutical compositions comprising them and their use in therapy as inhibitors of Phosphoinositide 3-Kinases (PI3Ks).
Synthesis of pyrazolo 3,4-pyrimidine analogues of the potent agent N-4-2-2-amino-4 3-oxo-7-pyrrolo 2,3-pyrimidin-5-yl ethylbenzoyl-L-glutamic acid (LY231514)
作者:Edward C. Taylor、Hemantkumar H. Patel
DOI:10.1016/s0040-4020(01)80479-8
日期:1992.1
Several pyrazolo[3,4-d]pyrimidine analogues of the potent antitumor agent N-4-12-(2-amino-4(3H)-oxo-7H-pyrrolo [2,3-d]pyrimidin-5-yl)ethyl]benzoyl}-L-glutamic acid (LY231514, 5) have been prepared. A principal synthetic step proved to be a palladium-catalyzed C-C coupling of the 5-halo-substituted pyrazolo[3,4-d]pyrimidines 12-15 with dimethyl 4-ethynylbenzoyl-L-glutamate (16). An additional pyrazolo[3,4-d]pyrimidine analogue of 5 possessing an isofolic acid bridge unit (-NHCH2-) was prepared by reductive alkylation of diethyl 4-formylbenzoyl-L-glutamate (31) with 2-methyl-5-amino-4(3H)-oxo-7H-pyrazolo[3,4-d]pyrimidine (30). Only compound 26 proved to have in vitro cell growth inhibitory activity.
7-SUBSTITUTED 8-AZA-7-DEAZAPURINES AND 2,8-DIAZA-7-DEAZA-PURINES: SYNTHESIS OF NUCLEOSIDES AND OLIGONUCLEOTIDES
作者:Wenqing Lin、Kuiying Xu、Frank Seela
DOI:10.1081/ncn-200059218
日期:2005.4.1
7-Substituted 8-aza-7-deazaadenosines la-e were synthesized by Sonogashira cross coupling from the corresponding 7-iodo nucleoside in 36- 79% yields. Starting from 7-bromo (or 7-iodo)-8-aza- 7-deazaadenine, 2a,b were obtained by acid-catalyzed glycosylation followed by deprotection in 53 and 35% yields, respectively. Compounds 2b was applied to cross coupling reaction to give 2c-d in 34-95% yield. Compounds 2a and 4b were further transformed to the phosphoramidites 5 and 6b in 9 and 49% overall yields, which were incorporated into oligonucleotides.
Pyrazolo[3,4-d]pyrimidine ribonucleosides related to 2-aminoadenosine and isoguanosine: synthesis, deamination and tautomerism
作者:Frank Seela、Kuiying Xu
DOI:10.1039/b708736e
日期:——
than that of the related purines. The pK(a) values indicate that the 7-non-functionalized nucleosides 1a (pK(a) 5.8) and 15 (pK(a) 6.4) are possibly protonated in neutral conditions when incorporated into RNA. The nucleosides 3a-d exist predominantly in the keto (lactam) form with K(TAUT) (keto/enol) values of 400-1200 compared to 10(3)-10(4) for pyrrolo[2,3-d]pyrimidine isoguanosine derivatives 4a-c