Design and synthesis of uracil urea derivatives as potent and selective fatty acid amide hydrolase inhibitors
作者:Yan Qiu、Jie Ren、Hongwei Ke、Yang Zhang、Qi Gao、Longhe Yang、Canzhong Lu、Yuhang Li
DOI:10.1039/c7ra02237a
日期:——
picomolar FAAH inhibitors (4c, IC50 = 0.3 ± 0.05 nM; 4d, IC50 = 0.8 ± 0.1 nM) were developed. Compound 4c inhibited FAAH in a rapid, selective, noncompetitive, and irreversible pattern. This study provides several highlypotent and selective FAAH inhibitors and an optimized chemical scaffold for the development of FAAH inhibitors. We anticipate that these FAAH inhibitors will enable new possibilities in
A series of 1-amino-5-substituted uracils and their 4-thio or 2,4-dithio substituted analogues were synthesized and assayed for anti-conflict activity in rats and anesthetic activity in mice. 1-Amino-5-halogenouracils 3b-e, 1-amino-4-thiouracil (9a), and 1-amino-5-halogeno-4-thiouracils 9c, d showed both anti-conflict and anesthetic activities. The most active compound was 1-amino-5-chloro-4-thiouracil
The antiproliferativeactivity screening on human tumor cell lines of a series of modified uracil and cytosine bases as well as some corresponding acyclonucleosides, and comparison of structure–activity relationship revealed the importance of chemical reactivity of the substituent attached to the C5-position of uracil for the activity of studied compounds. Namely, the results obtained for the most
The kinetics of the rearrangement of some isopyrimidines to pyrimidines studied by pulse radiolysis
作者:Man Nien Schuchmann、Mohamed Al-Sheikhly、Clemens von Sonntag、Anthony Garner、George Scholes
DOI:10.1039/p29840001777
日期:——
oxidation of the 6-yl radicals derived by ˙OH attack on pyrimidines and dihydropyrimidines. The Kinetics of the rearrangment of the isopyrimidines into the corresponding pyrimidines has been followed by pulseradiolysis. The rearrangement of isouracil into uracil is proton-catalysed (k 1.8 × 107 l mol–1 s–1). Around pH 7 a spontaneous reaction, k 3 000 s–1, is observed. On increasing the pH the isouracil
异嘧啶是由asOH攻击嘧啶和二氢嘧啶而衍生的6-基团氧化而形成的。将异嘧啶重排成相应的嘧啶的动力学是通过脉冲辐射分解进行的。异尿嘧啶重排为尿嘧啶是质子催化的(k 1.8×10 7 l mol –1 s –1)。在pH值7左右,观察到自发反应k 3 000 s –1。随着pH值的增加,异尿嘧啶在N(3)处去质子化(p K a约为9.4)。所述isouracil阴离子的自发重排是相当慢(ķ ≤50秒1)。在pH> 10.5的OH - -催化反应集(ķ 4.9×10 5升摩尔1个小号-1),它涉及到一个第二去质子化,在C(5)。将5-羟基异尿嘧啶重排成异巴比妥酸也获得了相似的结果。阻断如3- methylisouracil的N(3)的位置,所述OH -在低得多的pH值诱发的重排在套(pH为9.5≤),即重排快(ķ 2.7×10 7升摩尔-1小号- 1),而不是其他两个系统中观察到的情况。
Measurement of Oxidative Damage at Pyrimidine Bases in γ-Irradiated DNA
Emphasis was placed in this work on the measurement of four oxidized pyrimidine bases, including 5-(hydroxymethyl)uracil (5-HMUra), 5-formyluracil (5-ForUra), 5-hydroxycytosine (5-OHCyt), and 5-hydroxyuracil (5-OHUra), in isolated DNA upon exposure to gamma radiation in aeratedaqueoussolution. For this purpose, both high performance liquid chromatography associated with electrochemical detection (HPLC-EC)