Dehydrogenative alkenylation of uracils via palladium-catalyzed regioselective C–H activation
作者:Yi-Yun Yu、Gunda I. Georg
DOI:10.1039/c3cc41130c
日期:——
A regioselective Pd-catalyzed cross-dehydrogenativecoupling between uracils and alkenes is reported. This protocol provides easy access to a variety of 5-alkenyluracil structural motifs.
[EN] PURINE DERIVATIVES AS CD73 INHIBITORS FOR THE TREATMENT OF CANCER<br/>[FR] DÉRIVÉS DE PURINE EN TANT QU'INHIBITEURS DE CD73 POUR LE TRAITEMENT DU CANCER
申请人:VITAE PHARMACEUTICALS INC
公开号:WO2015164573A1
公开(公告)日:2015-10-29
Provided are novel compounds, pharmaceutically acceptable salts thereof, and pharmaceutical compositions thereof, which are inhibitors of CD73 and are useful in the treatment of cancer.
presence of diethylazodicarboxylate and triphenylphosphine selectively at the 5′-position to give the corresponding 4-(nucleosid-5′-yl-aci-nitro)-2,6-di-t-butylcyclohexa-2,5-dienone (aci-nitro ester of nucleoside) in 39–72% yields along with varied amounts of 5′-deoxy-5′-[N,N′-bis(ethoxycarbonyl)hydrazino]nucleosides. By comparison of the reactions of pyrimidine nucleosides having free 2′- and 3′-hydroxyl
Selective N3- and 5?-O-Alkylation of 2?,3?-O-isopropylideneuridine with methyl iodide
作者:Jari Hovinen
DOI:10.1002/hlca.19970800319
日期:1997.5.12
The 2′,3′-O-isopropylideneuridine (1) reacts with MeI in the presence of an excess of NaH in THF giving 2′,3′-O-isopropylidene-5′-O-methyluridine (2). Prolonged reaction time gives rise to 2′,3′-O-isopropylidene-3,5′-O-dimethyluridine (4). The use of an equimolar amount of base and alkylating agent results predominantly in methylation at N(3) ( 3).
在2',3'- Ô -isopropylideneuridine(1)反应用MeI在过量的NaH的THF存在下给予2',3'- ö异亚丙基-5'- Ö -methyluridine(2)。延长的反应时间产生2′,3′ - O-异亚丙基-3,5′- O-二甲基尿苷(4)。等摩尔量的碱和烷基化剂的使用主要导致在N(3)(3)处的甲基化。
Synthesis and Central Nervous System Depressant Effects of N3-Substituted 2',3'-O-Isopropylideneuridines.
作者:Che Shun YAO、Toshiyuki KIMURA、Kazuhito WATANABE、Shigemi KONDO、Ing Kang HO、Ikuo YAMAMOTO
DOI:10.1248/cpb.47.1802
日期:——
N3-Substituted derivatives of 2',3'-O-isopropylideneuridine (1) were synthesized and their pharmacological effects on the central nervous system (CNS) examined using mice. Methyl (2), ethyl (3), propyl (4), butyl (5), allyl (6), benzyl (7), o-, m-, p-xylyls (8, 9, 10), and alpha-phenylethyl (11) derivatives of 1 were administered to mice by intracerebroventricular (i.c.v.) injection for evaluating