Design and synthesis of 4-O-methylhonokiol analogs as inhibitors of cyclooxygenase-2 (COX-2) and PGF1 production
摘要:
A series of novel 4-O-methylhonokiol analogs were synthesized in light of revealing structure-activity relationship for inhibitory effect of COX-2 enzyme. The key strategy of the molecular design was oriented towards modification of the potential metabolic soft spots (e. g., phenol and olefin) or by altering the polar surface area via incorporating heterocycles such as isoxazole and triazole. Most of all exhibited the inhibitory effects on COX-2 and PGF(1) production but not macrophage NO production. Especially, aryl carbamates 10 and 11 exhibited more potent inhibitory activity against COX-2 and PGF(1) production. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.
Anodicoxidation of simple o-halogenated phenol derivatives has been investigated. Among the oxidation products, tricyclic ketone 9 was obtained, along with both the corresponding diaryl ethers 3 and 4 and the diaryls 5–8. Additionally, the effect of the alkyl substituent on the oxidation mode was inspected: anodicoxidation of phenols carrying n-propyl or 3-hydroxylpropyl groups 10b and 10c mainly
(2'-Cyano-4'-n-alkyl)phenyl-3-chloro-4-n-alkoxy benzoates and liquid
申请人:Kabushiki Kaisha Suwa Seikosha
公开号:US04279771A1
公开(公告)日:1981-07-21
A new ester compound suitable for use in a liquid crystal composition is provided. The compound is a (2'-cyano-4'-alkyl)phenyl-3-chloro-4 alkoxybenzoate represented by the following formula: ##STR1## wherein R and R' are selected from straight-chain alkyl groups having from one to eight carbon atoms. The ester is not a liquid crystal compound, but upon addition to a liquid crystal composition increases the absolute value of the dielectric anisotropy in the high frequency range. Such compositions are particularly well suited for the two frequency matrix-addressing drive in a liquid crystal display for complex character and graphic displays. The esters are prepared by condensing an acid chloride having the general formula ##STR2## and a phenol having the general formula ##STR3## wherein R and R' are as defined above.
Catalytic Asymmetric Synthesis of Aza-Quaternary Carbon Cyclohexadieneones Enabled by Aminative Dearomatization of Phenols
作者:Yu Chen、Shi-Kun Jia、Xiao Xiao、Min-Can Wang、Lihua Huang、Guang-Jian Mei
DOI:10.1021/acs.orglett.3c01746
日期:2023.6.30
catalytic asymmetric aminativedearomatization reaction of common phenols. As opposed to the well-studied indoles and naphthols, phenols are supposed to be challenging substrates for catalytic asymmetric dearomatization reactions in terms of their strong aromaticity and regioselectivity issues. Under the catalysis of a chiral phosphoric acid, the C4-regiospecific aminativedearomatization of phenols with
packing motifs (Type A–D) with unique mechanochromicluminescent properties. Type D crystals with linear alkyl groups did not show mechanochromicluminescent characters. The luminescent color of Linear-Me slightly and reversibly changed upon grinding. Linear-Et (Form 1) and Linear-sBu, which belong to Type B and C, respectively, exhibitedmechanochromicluminescent properties with rapid self-recovery
合成了一系列不同长度烷基链的双(苯并呋喃)[2,3- b :2′,3′- e ]吡嗪( BBFPz ),并研究了链长对其机械致色发光性能的影响。一些衍生物根据重结晶条件产生两种多晶型物。尽管衍生物的发光性质在溶液状态下几乎相同,但在结晶状态下观察到取决于其烷基链的不同发光。获得的晶体可分为四种堆积图案(A-D型),具有独特的机械致色发光特性。具有直链烷基的D型晶体没有表现出机械致色发光特征。Linear-Me的发光颜色在研磨后会发生轻微的可逆变化。Linear-Et(Form 1)和Linear- s Bu分别属于B型和C型,表现出具有快速自恢复特性的力致变色发光特性。其他晶体表现出机械致变色发光特性,且自恢复率相对较慢。目前的工作展示了一个非常有限的例子,即通过改变烷基链,用特定的发光体骨架来覆盖开/关机械致色发光(MCL)和自恢复特性。