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。
Design, synthesis and anticancer activity of new monastrol analogues bearing 1,3,4-oxadiazole moiety
作者:Fatma A.F. Ragab、Sahar M. Abou-Seri、Salah A. Abdel-Aziz、Abdallah M. Alfayomy、Mohamed Aboelmagd
DOI:10.1016/j.ejmech.2017.06.026
日期:2017.9
A series of dihydropyrimidine (DHPM) derivatives bearing 1,3,4-oxadiazole moiety was designed and synthesized as monastrol analogues. The new compounds were screened for their cytotoxic activity toward 60 cancer cell lines according to NCI (USA) protocol. Seven compounds were further examined against the most sensitive cell lines, leukemia HL-60(TB) and MOLT-4. The most active compounds were 9m against
A Simple and Efficient One-Pot Synthesis of Multifunctional 5-Aryl-<i>5H</i>-thiazolo[3,2-a]pyrimidines
作者:Seerat Fatima、Anindra Sharma、Rahul Sharma、Rama P. Tripathi
DOI:10.1002/jhet.831
日期:2012.5
One‐pot economical and efficientsynthesis of multifunctional 5H‐thiazolo[3,2‐a]pyrimidines by the reaction of 4‐aryl dihydrothiopyrimidines with propargyl bromide in the presence of inorganic base has been reported in very short time.
Studies on Fused β-Lactams: Synthesis of 1-Aza Analogs of Cephem
作者:S. D. Sharma、Verinder Kaur、Punita Bhutani、J. P. S. Khurana
DOI:10.1246/bcsj.65.2246
日期:1992.8
Annelation of 2-methylthio-3,4-dihydropyrimidine (3) with two moles of phenoxyacetyl chloride in presence of triethylamine did not yield the expected β-lactam (6) and instead the N-acylated compound 5a was obtained. Various N-acylated pyrimidines 5a–d also failed to yield any β-lactam. However, β-lactam ring has been conveniently grafted on to 2-methylthio-3,6-dihydropyrimidines 9a–d, 12 by annelating them with in situ prepared aryloxyketenes to furnish novel 1-aza analogs of cephem 10a–e and 13.
moieties were determined as α‐glycosidaseinhibitors. N‐Substituted pyrimidinethione and acetophenone derivatives (A1–A5, B1–B11, and C1–C11) were good inhibitors of the α‐glycosidase enzyme, with Ki values in the range of 104.27 ± 15.75 to 1,004.25 ± 100.43 nM. Among them, compound B7 was recorded as the best inhibitor, with a Ki of 104.27 ± 15.75 nM against α‐glycosidase. In silico studies were carried