The palladium-catalyzedoxidative C–H olefination of uracils or caffeines with alkenes using an atmospheric pressure of molecularoxygen as the sole oxidant has been disclosed. This novel strategy offers an efficient and environmentally friendly method to biologically important C5-alkene uracil derivatives or C8-alkene caffeine derivatives.
Palladium(II)-catalyzed oxidative homo-coupling of 1,3-dimethyluracil derivatives
作者:Ko Hoon Kim、Hyun Seung Lee、Sung Hwan Kim、Jae Nyoung Kim
DOI:10.1016/j.tetlet.2011.12.135
日期:2012.3
A palladium-catalyzed oxidativehomo-coupling of 1,3-dimethyluracil was examined. Two types of uracil dimer, C5–C5′ linked dimer and C5–C6′ linked dimer were obtained in variable yields depending on the conditions along with a low yield of C5–C5′ and C6–C5′ linked uracil trimer.
Novel xanthine compounds represented by the following formula:
and pharmaceutically acceptable salts thereof have a diuretic action, a renal-protecting action and a vasodilative action.
The compounds are useful as a diuretic, a renal-protecting agent and an antihypertensive agent.
(DE) Die Erfindung betrifft neue Xanthinderivate der allgemeinen Formel (I), Verfahren zu ihrer Herstellung sowie ihre Verwendung als Arzneimittel.(EN) The invention concerns new xanthine derivatives of formula (I), a method for preparing them, and their use as drugs.(FR) Nouveaux dérivés de xanthine ayant la formule (I), leur procédé de production et leur utilisation comme médicaments.
(德语) Die Erfindung betrifft neue Xanthinderivative der allgemeinen Formel (I), Verfahren zu ihrer Herstellung sowie ihre Verwendung als Arzneimittel.
(英文) The invention concerns new xanthine derivatives of formula (I), a method for preparing them, and their use as drugs.
(法语) Nouveaux dérivés de xanthine ayant la formule (I), leur procédé de production et leur utilisation comme médicaments.
An efficient synthesis of 5-phosphorylated uracil derivatives: oxidative cross-coupling between uracil and dialkyl phosphites
作者:Se Hee Kim、Sung Hwan Kim、Cheol Hee Lim、Jae Nyoung Kim
DOI:10.1016/j.tetlet.2013.01.056
日期:2013.3
An efficient synthesis of 5-phosphorylated uracil derivatives has been carried out via an oxidative cross-coupling reaction between uracil derivatives and dialkyl phosphites in the presence of Mn(OAc)(3) in AcOH. (c) 2013 Elsevier Ltd. All rights reserved.