β-dicarbonyl compounds. The use of these chiral iron–salen complexes as catalysts provides a new method for conducting these three important reactions under environmentally sustainable conditions. Iron(III)–salen complexes based on a chiral cis-2,5-diaminobicyclo[2.2.2]octane scaffold are used as catalysts for a variety of stereoselective reactions. High enantio- and diastereoselectivities can be achieved with
Imidazole derivatives having an inhibitory activity for farnesyl transferase and process for preparation thereof
申请人:LG Chemical Ltd.
公开号:US06268363B1
公开(公告)日:2001-07-31
The present invention relates to a novel imidazole derivative represented by formula (1) which shows an inhibitory activity against farnesyl transferase or pharmaceutically acceptable salts or isomers thereof, in which A, n1 and Y are defined in the specification; to a process for preparation of the compound of formula (1); to intermediates which are used in the preparation of the compound of formula (1); and to a pharmaceutical composition comprising the compound of formula (1) as an active ingredient.
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
Synthesis, Structure, and Optical Studies of Donor-Acceptor-Type Near-Infrared (NIR) Aza-Boron-Dipyrromethene (BODIPY) Dyes
作者:Naresh Balsukuri、Mohsin Y. Lone、Prakash C. Jha、Shigeki Mori、Iti Gupta
DOI:10.1002/asia.201600167
日期:2016.5.20
electrochemical, and computational studies were carried out. The absorption and emission spectra of aza–BODIPYs were significantly redshifted (≈100 nm) relative to the parent tetraphenylaza–BODIPY. Fluorescence studies suggested effective energy transfer (up to 93 %) from donor groups to the aza–BODIPY core in all of the compounds under study. Time‐dependent (TD)‐DFT studies indicated effective electronic interactions