Novel xanthine analogues are described which are selective PDE4 inhibitors with improved therapeutic potential over theophylline. (C) 1998 Elsevier Science Ltd. All rights reserved.
Iron(iii) catalysed synthesis of unsymmetrical di and trisubstituted ureas – a variation of classical Ritter reaction
作者:Hosamani Basavaprabhu、Vommina V. Sureshbabu
DOI:10.1039/c2ob06916d
日期:——
An application of the classical Ritter reaction for the synthesis of unsymmetrical di and trisubstituted ureas catalyzed by FeCl3 is described. The protocol is of significant interest in view of the easy availability of precursors, mild reaction conditions employed and interestingly its applicability for the alkylation of alcohols capable of forming stable carbocationic intermediates even to the sterically hindered moieties.
An easy access to unsymmetrical ureas: a photocatalytic approach to the Lossen rearrangement
作者:Arvind K. Yadav、Vishnu P. Srivastava、Lal Dhar S. Yadav
DOI:10.1039/c4ra03805c
日期:——
synthesis of unsymmetrical ureas from various hydroxamic acids and amines has been developed. Plausibly, the protocol involves visible-light-initiated in situ formation of Vilsmeier–Haack reagent and COBr2 with CBr4 and a catalytic amount of DMF in the presence of Ru(bpy)3Cl2 as a photocatalyst to bring about the Lossenrearrangement at room temperature.
1,3-Disubstituted-zanthines have therapeutic utility via TNF or phosphodiesterase inhibition.
1,3-二取代黄嘌呤通过抑制TNF或磷酸二酯酶具有治疗效用。
[EN] XANTHINES AND THEIR THERAPEUTIC USE<br/>[FR] XANTHINES ET LEUR UTILISATION THERAPEUTIQUE
申请人:CHIROSCIENCE LIMITED
公开号:WO1996036638A1
公开(公告)日:1996-11-21
(EN) 1,3-Disubstituted-zanthines have therapeutic utility via TNF or phosphodiesterase inhibition.(FR) Les xanthines 1,3-disubstituées présentent un intérêt thérapeutique, par l'inhibition de la TNF ou de la phosphodiestérase.
1,3-二取代的三类生物素对TNF或磷酯酶有治疗用途。 Les xanthines 1,3-disubstituées动工显示出理论上的意义,大抵是因为它们在风smooth ER受体抑制和磷酯酶抑制方面的大有作为。
Sah, Journal of the Chinese Chemical Society (Peking), 1946, vol. 13, p. 22,26,27