Concise Route to 3-Arylisoquinoline Skeleton by Lewis Acid Catalyzed C(sp3)–H Bond Functionalization and Its Application to Formal Synthesis of (±)-Tetrahydropalmatine
摘要:
An expeditious route to furnish an isoquinoline skeleton via hydride shift mediated C-H bond functionalization was developed. In this process, an unusual [1,5]-H shift without the assistance of the adjacent heteroatom took place to produce tetrahydroisoquinoline derivatives in good to excellent chemical yields. The formal synthesis of (+/-)-tetrahydropalmatine was achieved by exploiting this new transformation.
[EN] NOVEL HETEROCYCLIC AMIDE DERIVATIVES HAVING DIHYDROOROTATE DEHYDROGENASE INHIBITING ACTIVITY<br/>[FR] NOUVEAUX DERIVES D'AMIDES HETEROCYCLIQUES AYANT UNE ACTIVITE D'INHIBITION DE LA DIHYDROOROTATE DESHYDROGENASE
This invention provides a novel cyclic amide derivative with pharmacological activity. The compound of the present invention is a compound represented by the following general formula (1) or a salt thereof. In the formula, X1-X2 is S-CH2, etc.; R1 is an alkyl group, etc.; p is 0-7; R2 is hydrogen, alkyl, etc.; R3 is hydrogen, alkyl group, etc.; Y1-Y2 is CH=CH, etc.; R4 is halogen, alkyl group, etc.; q is 0-4; R5 represents halogen, hydrogen, alkyl group, etc.
Arylethynylacridines: electrochemiluminescence and photophysical properties
作者:Arumugasamy Elangovan、Hsing-Hua Chiu、Shu-Wen Yang、Tong-Ing Ho
DOI:10.1039/b410829a
日期:——
Electrogenerated chemiluminescence (ECL) of six new ethyne-based acridine derivatives (1–6) has been studied. The new acridine derivatives were synthesized by cross-coupling of 9-chloroacridine and corresponding donor-substituted phenylethynes under modified Sonogashira conditions. The donor groups were varied in the order of increasing steric hindrance and donor strength at the donor site. The solution phase photophysical properties and ECL of these compounds were studied comparatively in acetonitrile solvent. The UV-Visible spectra of compounds 1–5 exhibit closely the same maxima. Density functional theory (DFT) has been invoked to analyze and understand the unexpected UV-Visible absorption behavior. Compounds with weak electron donors produce excimer ECL irrespective of steric hindrance at the donor site, while the compound with a stronger donor gives rise to ECL that is blue-shifted with respect to its photoluminescence spectrum. All except one of these compounds also exhibit solid state fluorescence which may be useful for solid state devices such as organic light emitting diodes (OLEDs) and as laser dyes. The observed properties are discussed with reference to the structure of the compounds synthesized.
New compounds, pharmaceutical compositions and uses thereof
申请人:ROTH Gerald Juergen
公开号:US20120214785A1
公开(公告)日:2012-08-23
The invention relates to new compounds of the formula I
to their use as medicaments, to methods for their therapeutic use and to pharmaceutical compositions containing them.
这项发明涉及到公式I的新化合物及其作为药物的用途,以及用于治疗的方法和含有这些化合物的药物组合物。
Silver-Mediated <i>anti</i>-Markovnikov and Markovnikov-Selective Hydrotrifluoromethylthiolation of Terminal Alkynes
作者:Wei Wu、Wenpeng Dai、Xinfei Ji、Song Cao
DOI:10.1021/acs.orglett.6b01286
日期:2016.6.17
established for the synthesis of a variety of vinyl trifluoromethyl thioethers. The anti-Markovnikov and Markovnikov adducts were obtained in moderate to good yields via two different reaction systems. Studies to probe the mechanism of the anti-Markovnikov addition reactions including the radical trapping experiments, kinetic isotopeeffect experiments, and deuterated experiments for determination of H-sources
建立了在AgSCF 3和K 2 S 2 O 8存在下直接进行末端炔烃加氢三氟甲基硫醇化的第一个实例,用于合成各种乙烯基三氟甲基硫醚。所述抗经由两个不同的反应系统,可在中等至良好的产率获得-Markovnikov和马氏加成物。进行了包括自由基俘获实验,动力学同位素效应实验和氘代测定氢源在内的反马尔可夫尼科夫加成反应机理的研究。
Discovery of Novel Sphingosine-1-Phosphate-1 Receptor Agonists for the Treatment of Multiple Sclerosis
作者:Sun Jun Park、Seul Ki Yeon、Yoowon Kim、Hyeon Jeong Kim、Siwon Kim、Jushin Kim、Ji Won Choi、Byungeun Kim、Elijah Hwejin Lee、Rium Kim、Seon Hee Seo、Jaeick Lee、Jun Woo Kim、Ha-Yeon Lee、Hayoung Hwang、Yong-Sun Bahn、Eunji Cheong、Jong-Hyun Park、Ki Duk Park
DOI:10.1021/acs.jmedchem.1c01979
日期:2022.2.24
The sphingosine-1-phosphate-1 (S1P1) receptoragonists have great potential for the treatment of multiple sclerosis (MS) because they can inhibit lymphocyte egress through receptor internalization. We designed and synthesized triazole and isoxazoline derivatives to discover a novel S1P1 agonist for MS treatment. Of the two scaffolds, the isoxazoline derivative was determined to have excellent in vitro