Metal-Free Visible-Light-Mediated Desulfurization and Aromatization of Dihydropyrimidine-2-thiones for Synthesis of 2-Unsubstituted Pyrimidines
作者:Xi-Cun Wang、Zheng-Jun Quan、Tian-Yao Yang
DOI:10.1055/s-0036-1588401
日期:——
The visible-light-mediated aerobic desulfurization and aromatization of Biginelli 3,4-dihydropyrimidine-2(1H)-thiones for a one-step synthesis of 2-unsubstituted pyrimidines was established. The protocol uses molecular oxygen as an inexpensive oxidant, with visible-light irradiation, and eosin B as an organophotoredox catalyst.
建立了 Biginelli 3,4-二氢嘧啶-2(1H)-硫酮的可见光介导的有氧脱硫和芳构化,用于一步合成 2-未取代嘧啶。该协议使用分子氧作为廉价氧化剂,采用可见光照射,曙红 B 作为有机光氧化还原催化剂。
A domino desulfitative coupling and decarboxylative coupling of 3,4-dihydropyrimidine-2-thiones with copper(I) carboxylates
作者:Zhang Zhang、Shi-Hong Lu、Bin Xu、Xi-Cun Wang
DOI:10.1016/j.cclet.2016.12.034
日期:2017.5
general carbon-nitrogen and carbon-carbon cross-couplingreaction between 3,4-dihydropyrimidine-2-thiones and copper(I) carboxylates were performed in the presence of palladium acetate. The copper(I) carboxylates act not only as desulfurative reagents but also as sources of carbon nucleophiles. A wide array of highly substituted and functionalized pyrimidines scaffolds were synthesized in good yields
UV-Light-Irradiated Trifluoromethylation of Diheteroaryl Disulfides with CF<sub>3</sub>
SO<sub>2</sub>
Na
作者:Bao-Qian Cao、Yi-Feng Qiu、Xi Zhang、Zheng-He Zhu、Zheng-Jun Quan、Xi-Cun Wang
DOI:10.1002/ejoc.201801565
日期:2019.2.14
A trifluoromethylation of diheteroaryldisulfides with CF3SO2Na to afford the trifluoromethyl thioethers derivatives. The conversion has good functional group compatibility, without external photocatalyst, generating the corresponding products in moderate to good yields under mild conditions, and the disulfide is fully utilized while constructing two S‐CF3 bonds.
用CF 3 SO 2 Na对二杂芳基二硫化物进行三氟甲基化,得到三氟甲基硫醚衍生物。该转化具有良好的官能团相容性,无需外部光催化剂,在温和的条件下以中等至良好的产率生成了相应的产物,并且在构建两个S-CF 3键的同时充分利用了二硫键。
Methods and compositions for treating pain
申请人:Moran M. Magdalene
公开号:US20070219222A1
公开(公告)日:2007-09-20
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。
A Brønsted acid catalysed enantioselective Biginelli reaction
chiral derivative of 1,2-benzenedisulfonimide, namely (-)-4,5-dimethyl-3,6-bis(o-tolyl)-1,2-benzenedisulfonimide is herein proven to be an efficient chiral catalyst in a one pot three-component Biginellireaction. In fact the yields of the target...