1,3-Diarylcycloalkanopyrazoles and diphenyl hydrazides as selective inhibitors of cyclooxygenase-2
作者:Zhihua Sui、Jihua Guan、Michael P. Ferro、Kathy McCoy、Michael P. Wachter、William V. Murray、Monica Singer、Michele Steber、Dave M. Ritchie、Dennis C. Argentieri
DOI:10.1016/s0960-894x(00)00041-x
日期:2000.3
cyclooxygenase-2. The 1,3-diaryl substitution pattern of the pyrazole ring in 1 differentiates these compounds from most of the known selective COX-2 inhibitors that contain two aryl rings at the adjacent positions on a heterocyclic or a phenylring. Similarly, the two phenylrings in 2 are also separated by three atoms. SAR of both phenylrings in 1 and 2, and the aliphatic ring in 1 will be discussed.
Trimethylchlorosilane-Mediated Mild α-Chlorination of 1,3-Dicarbonyl Compounds Promoted by Phenyliodonium Diacetate
作者:Yingpeng Su、Yulai Hu、Siying Chong、Lili Wu、Weigang Zhang、Junyan Ma、Xiaowei Chen、Danfeng Huang、Ke-Hu Wang
DOI:10.1055/s-0035-1561572
日期:——
Abstract Trimethylchlorosilane was used as chlorine source for the α-chlorination of 1,3-dicarbonyl compounds with phenyliodonium diacetate as oxidant at room temperature. The reaction allows the selective synthesis of α-monochlorinated products from different kinds of 1,3-dicarbonyl compounds in good yield. The potential possibility of this conversion for bromination has also been investigated. T
A nitrogen-containing bicyclic heterocyclic compound represented by the following formula (1) is provided. When the compound or a salt thereof is administered to a human being or an animal, the compound has a strong antagonistic action against EP1 receptors, and is useful, for example, as an active ingredient of a medicine for the prevention and/or treatment of overactive bladder. The compound is also useful as an active ingredient of a medicine for the prevention and/or treatment of symptoms such as frequency urinary, urinary urgency, or urinary incontinence.
Type II Photoreaction of 2-Benzoylcycloalkanones: Conformational Control in the Biradical Formation and in the Behavior of Biradicals
作者:Tadashi Hasegawa、Fusao Hojo、Michikazu Yoshioka
DOI:10.1246/bcsj.63.2428
日期:1990.8
The photoreactivities of 2-benzoylcycloalkanones were shown to be controlled by their ring conformation; 2-benzoylcycloalkanones underwent the TypeII elimination and/or cyclization, and/or the α-cleavage reaction.
An iridium-catalyzed coupling reaction of alcohols with enones has been successfully developed providing access to 1,3-diketones with high selectivity in good yields. This reaction provides an atom-economical route to 1,3-diketones from readily available alcohols.