The present application relates to compounds and methods for treating pain, incontinence and other conditions.
本申请涉及化合物和治疗疼痛、失禁和其他疾病的方法。
Efficient Catalytic Synthesis of 3,4-Dihydropyrimidin-2-ones/thiones <i>via</i>
Little Acidic Ionic Liquid Combined with Rapid Heating Ways
作者:Guo-Ping Zhang、Da-Yu Tian、Wang-Ming Shi
DOI:10.1002/jhet.3292
日期:2018.11
Catalyticsynthesis of 3,4‐dihydropyrimidin‐2(1H)‐ones/thiones was efficiently promoted by as little as 2.5 mol% of Brønsted acidicionicliquid [(CH2)3SO3HMIM]HSO4 catalyst loading viarapidheatingways. Interestingly, rapidheating effectively improved yields to avoid side products. Furthermore, the mechanism has been speculated that the reaction proceeds may be viarapidly one‐step condensation
通过快速加热负载低至2.5 mol%的布朗斯台德酸性离子液体[(CH 2)3 SO 3 HMIM] HSO 4催化剂可有效地促进3,4-二氢嘧啶-2(1 H)-酮/硫酮的催化合成方法。有趣的是,快速加热有效地提高了产量以避免副产物。此外,据推测该机理可能是通过快速的一步冷凝而不是缓慢的逐步冷凝来进行的。此外,可以回收催化剂以重复使用(最多七次),整个绿色反应过程增加了其实用性。
Efficient Ce(NO3)3·6H2O-Catalyzed Solvent-Free Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones
Cerium(III) nitrate hexahydrate efficiently catalyzes the three-component Biginelli reaction under solvent-free conditions of an aldehyde, a β-keto ester or β- diketone and urea or thiourea to afford the corresponding 3,4-dihydropyrimidin-2(1H)- ones or –thiones in excellent yields.
An effective one-pot synthesis of dihydropyrimidinonoes using Melamine-formaldehyde resin supported H+ (MFRH) as an inexpensive and readily available reagent through Biginelli condensation reaction of aldehyde, 1,3-dicarbonyl compounds and (thio)urea in conventional and under microwave irradiation conditions is described. Excellent yields, short reaction times for formation of the products and simple work-up are attractive features of this green protocol.
Fabrication of porous ultrathin carbon nitride nanosheet catalysts with enhanced photocatalytic activity for N- and O-heterocyclic compound synthesis
作者:Yancong Li、Jiliang Ma、Zhendong Liu、Dongnv Jin、Gaojie Jiao、Yanzhu Guo、Qiang Wang、Jinghui Zhou、Runcang Sun
DOI:10.1039/d0nj05101b
日期:——
simple and efficient photocatalytic method for the synthesis of dihydropyrimidinones (DHPMs) and their derivatives via porous ultrathin carbon nitride nanosheets (p-CNNs) without solvents was demonstrated. The yields of 3,4-dihydropyrimidin-2(1H)-ones/thiones and their derivatives were up to 97.0%. Furthermore, the yield of 5-ethoxycarbonyl-6-methyl-4-phenyl-3,4-dihydropyrimidin-2(1H)-one in the 10th
通过无溶剂的多孔超薄氮化碳纳米片(p-CNNs)合成了一种简单高效的光催化方法,用于合成二氢嘧啶酮(DHPM)及其衍生物。3,4-二氢嘧啶-2(1 H)-酮/硫酮及其衍生物的产率高达97.0%。此外,5-乙氧基羰基-6-甲基-4-苯基-3,4-二氢嘧啶-2(1 H)-第10个周期中的1个保留了其第1个值的98.9%。考虑到环境和经济利益,这项工作表现出各种优点,包括优异的产量,环境友好性,便宜性以及避免使用溶剂和金属基光催化剂。此外,p-CNN的优异性能和对环境无害的反应体系也通过光催化合成12-苯基-9,9-二甲基-8,9,10,12-四氢苯并[ a ] xanthen-11进行了检验。-一个和5-苯基-1(4-甲氧基苯基)-3 [(4-甲氧基-苯基)-氨基] -1 H-吡咯-2(5 H)-一个。这项工作为在温和的反应条件下使用无金属的光催化剂进行三组分反应铺平了道路。