An object of the present invention is to provide a novel thiazole compound with specific inhibitory activity against phosphodiesterase 4.
The present invention provides a compound represented by Formula (1), an optical isomer thereof, or a salt thereof:
wherein R1 is a di-C1-6 alkoxyphenyl group; R2 is any one of the following groups (a) to (t): (a) a phenyl group; (b) a naphthyl group; (c) a pyridyl group; (d) a furyl group; (e) a thienyl group; (f) an isoxazolyl group; (g) a thiazolyl group; (h) a pyrrolyl group; (i) an imidazolyl group; (j) a tetrazolyl group; (k) a pyrazinyl group; (1) a thienothienyl group; (m) a benzothienyl group; (n) an indolyl group; (o) a benzimidazolyl group; (p) an indazolyl group; (q) a quinolyl group; (r) a 1,2,3,4-tetrahydroquinolyl group; (s) a quinoxalinyl group; and (t) a 1,3-benzodioxolyl group; and A is any one of the following groups (i) to (vi): (i) -CO-B- wherein B is a C1-6 alkylene group; (ii) -CO-Ba wherein Ba is a C2-6 alkenylene group; (iii) -CH(OH)-B-; (iv) -COCH(COOR3)-Bb- wherein R3 is a C1-6 alkyl group and Bb is a C1-6 alkylene group; and (v) -Bc- wherein Bc is a C2-6 alkylene group.
Chiral Cationic Cp<sup>x</sup>Ru(II) Complexes for Enantioselective Yne-Enone Cyclizations
作者:David Kossler、Nicolai Cramer
DOI:10.1021/jacs.5b08232
日期:2015.10.7
cyclopentadienyl (Cp) group is a ligand of great importance for many transition-metal complexes used in catalysis. Cationic CpRu(II) complexes with three free coordination sites are highly versatile catalysts for many atom-economic transformations. We report the synthesis of a family of Cp(x)Ru(II) complexes with chiral Cp ligands keeping the maximum number of available coordination sites. The cationic
环戊二烯基 (Cp) 基团是许多用于催化的过渡金属配合物的重要配体。具有三个自由配位点的阳离子 CpRu(II) 配合物是用于许多原子经济转化的高度通用的催化剂。我们报告了具有手性 Cp 配体的 Cp(x)Ru(II) 复合物家族的合成,可保持最大数量的可用协调位点。阳离子成员是通过正式的异狄尔斯-阿尔德反应进行炔-烯酮环化的有效且选择性的催化剂。转化在 -20 °C 下进行 <1 小时,并提供高达 99:1 er 的吡喃。不饱和酯或 Weinreb-酰胺底物直接产生环烯醚萜骨架。
Thiazole Compound and Use Thereof
申请人:Takemura Isao
公开号:US20080039511A1
公开(公告)日:2008-02-14
An object of the present invention is to provide a novel thiazole compound with specific inhibitory activity against phosphodiesterase 4.
The present invention provides a compound represented by Formula (1), an optical isomer thereof, or a salt thereof:
wherein R1 is a di-C
1-6
alkoxyphenyl group; R2 is any one of the following groups (a) to (t): (a) a phenyl group; (b) a naphthyl group; (c) a pyridyl group; (d) a furyl group; (e) a thienyl group; (f) an isoxazolyl group; (g) a thiazolyl group; (h) a pyrrolyl group; (i) an imidazolyl group; (j) a tetrazolyl group; (k) a pyrazinyl group; (l) a thienothienyl group; (m) a benzothienyl group; (n) an indolyl group; (o) a benzimidazolyl group; (p) an indazolyl group; (q) a quinolyl group; (r) a 1,2,3,4-tetrahydroquinolyl group; (s) a quinoxalinyl group; and (t) a 1,3-benzodioxolyl group; and A is any one of the following groups (i) to (vi): (i) —CO—B— wherein B is a C
1-6
alkylene group; (ii) —CO—Ba wherein Ba is a C
2-6
alkenylene group; (iii) —CH(OH)—B—; (iv) —COCH(COOR3)-Bb- wherein R3 is a C
1-6
alkyl group and Bb is a C
1-6
alkylene group; and (v) -Bc- wherein Bc is a C
2-6
alkylene group.
Copper-Catalyzed Aerobic Oxidative/Decarboxylative Phosphorylation of Aryl Acrylic Acids with P(III)-Nucleophiles
作者:Biquan Xiong、Lulu Si、Longzhi Zhu、Yu Liu、Weifeng Xu、Ke-Wen Tang、Shuang-Feng Yin、Peng-Cheng Qian、Wai-Yeung Wong
DOI:10.1021/acs.joc.3c01238
日期:2023.9.1
A copper-catalyzed aerobic oxidative/decarboxylative phosphorylation of aryl acrylic acids with P(III)-nucleophiles via the Michaelis–Arbuzov rearrangement for the synthesis of β-ketophosphine oxides, β-ketophosphinates, and β-ketophosphonates is reported. The present reaction could be conducted effectively without the use of a ligand and a base. Various kinds of aryl acrylic acids and P(III)-nucleophiles