Triethylamin-mediated addition of 2-aminoethanethiol hydrochloride to chalcones: Synthesis of 3-(2-aminoethylthio)-1-(aryl)-3-(thiophen-2-yl) propan-1-ones and 5,7-diaryl-2,3,6, 7-tetrahydro-1,4-thiazepines
作者:Meliha Burcu Gürdere、Ali Cemal Emeç、Osman Nuri Aslan、Yakup Budak、Mustafa Ceylan
DOI:10.1080/00397911.2016.1152585
日期:2016.3.18
addition, bearing a 2-thienyl group at the 3-position, gave the only addition adduct at room temperature in 3 h, whereas the chalcones bearing the 2-furyl group at the 1-position gave an addition-cyclization product (1, 4-thiazepine) in the same conditions. The effect of the groups to the reaction was investigated by changing the 1- and 3-position groups. The chalcones bearing the 2-thienyl group at the 1-position
Heterocycles. Part I. A new route to the synthesis of substituted 2-aminopyrimidines
作者:N. R. El-Rayyes
DOI:10.1002/jhet.5570190240
日期:1982.3
Heterocyclic aldehydes (A) reacted with alkyl aryl ketones (B) to give the corresponding 1,3-diaryl-2-propen-1-ones (Ia-1). Condensation of these chalcones with guanidine produced the corresponding 2-amino-4,6-diarylpyrimidines (IIa-1). The structure of all products was substantiated by chemical and spectroscopic methods.
Synthesis, Cyclooxygenase Inhibition, Anti-Inflammatory Evaluation, and Ulcerogenic Liability of New 1,3,5-Triarylpyrazoline Derivatives Possessing a Methanesulfonyl Pharmacophore
作者:Khaled R. A. Abdellatif、Wael A. A. Fadaly、Amany A. Azouz
DOI:10.1002/ardp.201600145
日期:2016.10
A new series of 1,3,5‐triarylpyrazolines 13a–l was synthesized and all prepared compounds were evaluated for their in vitro COX‐1/COX‐2 inhibitory activity and in vivo anti‐inflammatory activity. All test compounds were more selective for the COX‐2 isozyme and showed good in vivo anti‐inflammatory activity. Compound 13h was the most COX‐2 selective compound (COX‐2 selectivity index (SI) = 10.23) and
Synthesis of (4-Trifluoromethyl)isoxazoles through a Tandem Trifluoromethyloximation/Cyclization/Elimination Reaction of α,β-Unsaturated Carbonyls
作者:Paramita Pattanayak、Tanmay Chatterjee
DOI:10.1021/acs.joc.2c03053
日期:——
pharmaceutically potential heteroaromatics, i.e., 4-(trifluoromethyl)isoxazoles including a trifluoromethyl analogue of an anticancer agent. The transformation requires only a couple of commercially available and cheap reagents i.e., CF3SO2Na as the trifluoromethyl source, and tBuONO as an oxidant as well as a source of N and O. Notably, 5-alkenyl-4-(trifluoromethyl)isoxazoles were further synthetically diversified
我们公开了一种无金属、级联区域和立体选择性三氟甲基肟化、环化和消除策略,使用现成的 α,β-不饱和羰基化合物来获得各种具有药学潜力的杂芳烃,即 4-(三氟甲基) 异恶唑,包括三氟甲基抗癌剂的类似物。该转化仅需要几种市售的廉价试剂,即 CF 3 SO 2 Na 作为三氟甲基源,以及tBuONO 作为氧化剂以及 N 和 O 的来源。值得注意的是,5-alkenyl-4-(trifluoromethyl)isoxazoles 进一步合成多样化为一类新的双杂芳基,即 5-(3-pyrrolyl)-4-(三氟甲基)异恶唑。机理研究揭示了反应的激进途径。
4-dimethoxyphenyl)-5-(thiophen-2-yl)isoxazole 14, we designed a set of 4-(trifluoromethyl)isoxazoles for synthesis and further anti-cancer evaluation. Among various molecules, 3-(3,4-dimethoxyphenyl)-5-(thiophen-2-yl)-4-(trifluoromethyl)isoxazole 2g (IC50 = 2.63 μM) and 3-(thiophen-2-yl)-5-(4-(thiophen-2-yl)-1H-pyrrol-3-yl)-4-(trifluoromethyl)isoxazole 5 (IC50 = 3.09 μM) exhibited the best anti-cancer activity
在此,我们报告了一系列完全取代的 4-(三氟甲基)异恶唑的设计和合成,并评估了它们对 MCF-7、4T1 和 PC-3 细胞系的抗癌活性,作为概念验证研究。 4-(三氟甲基)异恶唑是一类合成上具有挑战性的分子,迄今为止开发出的合成方法很少,并且所有方法都受到一些严重的限制。最近,我们开发了一种新颖的、无金属的通用合成策略,以使用廉价的 CF 3 SO 2 Na 作为 –CF 3基团的来源和多任务t BuONO 作为原料,从容易获得的查尔酮开始获得具有合成挑战性的 4-(三氟甲基)异恶唑。氧化剂以及N和O的来源,因此我们克服了以前方法的局限性。基于异恶唑类抗癌剂 3-(3,4-二甲氧基苯基)-5-(噻吩-2-基)异恶唑14的结构,我们设计了一组用于合成和合成的 4-(三氟甲基)异恶唑。进一步的抗癌评价。在各种分子中,3-(3,4-二甲氧基苯基)-5-(噻吩-2-基)-4-(三氟甲基)异恶唑2g