上在光弗里斯1,3-σ迁移氢移位动力学研究重排中间的2,4-二甲氧基- 6-(p -tolyloxy) -小号嗪(PTTH)在各种溶剂中,通过使用激光闪光光解进行了技术。脱水非极性甲基环己烷在293 K下的分子内[1,3]氢和氘位移的固有速率常数确定为1.7 s -1和5.7×10 -1 s -1, 分别。通过溶剂分子的基本催化作用,醇溶剂中的1,3-氢转移速率得到了显着提高。温度和同位素效应的实验结果表明,PTTH和PTTD的Photo-Fries重排中间体中的分子内[1,3]氢和氘迁移是通过量子力学隧穿在两个振动水平下进行的[ v = v 0和v = v 1(ΔE H = 3.4 3 kcal mol -1,ΔE D = 3.8 0 kcal mol -1)]。根据Formosinho提出的隧穿效应理论(TET),发现该系统的隧穿频率因子的大小小于先前报道的系统(乙酸苯酯)的隧穿频率因
NOVEL INDOL CARBOXYLIC ACID BISPYRIDYL CARBOXAMIDE DERIVATIVES, PHARMACEUTICALLY ACCEPTABLE SALT THEREOF, PREPARATION METHOD AND COMPOSITION CONTAINING THE SAME AS AN ACTIVE INGREDIENT
申请人:SEONG Churlmin
公开号:US20090258876A1
公开(公告)日:2009-10-15
Disclosed herein are a new indole carboxylic acid bispyridyl carboxamide derivative, a preparation method thereof, and a composition for prevention or treatment of obesity, urinary disorders, and CNS disorders, containing the same as an active ingredient. Because the indole carboxylic acid bispyridyl carboxamide derivatives according to the present invention have high affinity for 5-HT
2c
receptors, act selectively on the 5-HT
2c
receptors, the derivatives rarely have adverse effects caused by other receptors. Because the derivatives effectively inhibit serotonin activity, they may be useful for treatment or prevention of obesity; urinary disorders such as urinary incontinence, premature ejaculation, erectile dysfunction, and prostatic hyperplasia; CNS disorders such as depression, anxiety, concern, panic disorder, epilepsy, obsessive-compulsive disorder, migraine, sleep disorder, withdrawal from drug abuse, Alzheimer's disease, and schizophrenia, associated with 5-HT
2c
receptors.
Nickel-Catalyzed Suzuki–Miyaura Coupling of Heteroaryl Ethers with Arylboronic Acids
作者:Xiao-Jian Li、Jin-Ling Zhang、Yu Geng、Zhong Jin
DOI:10.1021/jo4005537
日期:2013.5.17
Nickel-catalyzedSuzuki–Miyaura coupling of heteroaryl ethers with arylboronicacids was described. Selective activation of the phenol C–O bonds was achieved by converting them into the corresponding aryl 2,4-dimethoxy-1,3,5-triazine-6-yl ethers, in which aryl C–O bond could be selectively cleaved with inexpensive, air-stable NiCl2(dppf) as a catalyst. Coupling of these readily accessible heteroaryl
current challenges in the field of C–H functionalization is the development of new removable/modifiable directinggroups (DGs). We report here the 4,6-dimethoxy-1,3,5-triazin-2-yloxy group as a new readily removable/modifiable DG for the regioselectiveacetoxylation of 2-(aryloxy)-4,6-dimethoxy-1,3,5-triazine. This developed phenol-derived DG can be easily removed to offer synthetically versatile pyrocatechols
Photo-deterioration inhibitor and composition containing the same
申请人:DAIKYO GOMU SEIKO LTD.
公开号:EP0527274A1
公开(公告)日:1993-02-17
A photo-deterioration inhibitor containing a compound represented by the general formula (I):
where R₁ and R₂ may be same or different and represent hydrogen, chlorine, hydroxyl group, alkoxy group having 1-18 carbon atoms, aryloxy group having 6-8 carbon atoms and mono- or dialkylamino group having 1-4 carbon atoms, respectively, and R₃ and R₄ may be same or different and represent hydrogen, chlorine, alkyl group having 1-8 carbon atoms, methoxy group and ethoxy group; a photo-deterioration inhibitory resin composition containing a polyolefin resin or polyolefin resin composition and the compound represented by the general formula (I); and a container formed from the photo-deterioration inhibitory resin composition containing the polyolefin resin or polyolefin resin composition and the compound represented by the general formula (I).