[EN] PYRROLOPYRIDAZINE DERIVATIVES<br/>[FR] DERIVES DE PYRROLOPYRIDAZINE
申请人:FUJISAWA PHARMACEUTICAL CO
公开号:WO2004063197A1
公开(公告)日:2004-07-29
The invention relates to compound of the formula (I) or its salt, in which R1, R2, R3 and R4 are as defined in the description, their use of as medicament, the process for their preparation and use for the treatment of PDE-IV or TNF-α mediated diseases.
I
<sub>2</sub>
‐Promoted [3+2] Cyclization of 1,3‐Diketones with Potassium Thiocyanate: a Route to Thiazol‐2(3
<i>H</i>
)‐One Derivatives
作者:Zhenyu An、Yafeng Liu、Pengbo Zhao、Rulong Yan
DOI:10.1002/adsc.202100228
日期:2021.7
An I2-promoted strategy has been developed for the synthesis of thiazol-2(3H)-onederivatives from 1,3-diketones with potassium thiocyanate. This [3+2] cyclization reaction involves C−S and C−N bond formation and exhibits good functional group tolerance. A series of thiazol-2(3H)-onederivatives are obtained in moderate to good yields.
已开发出一种 I 2促进策略,用于从 1,3-二酮与硫氰酸钾合成 thiazol-2(3 H )-one 衍生物。这种 [3+2] 环化反应涉及 C-S 和 CN 键的形成,并表现出良好的官能团耐受性。以中等至良好的产率获得了一系列 thiazol-2(3 H )-one 衍生物。
Aryl pyrimidine derivatives
申请人:Syntex (USA) Inc.
公开号:US05952331A1
公开(公告)日:1999-09-14
The aryl pyrimidine derivatives and pharmaceutically acceptable salts and N-oxides thereof, exhibit useful pharmacological properties, including utility as selective 5HT.sub.2B -antagonists.
Transition Metal-Free De Novo Synthesis of Sulfonated Pyrazoles from Sulfonyl Hydrazides, 1,3-Diketones, and Sodium Sulfinates at Room Temperature
作者:Jiawen Chen、Dongwei Chen、Jinqiang Kuang、Yongmin Ma
DOI:10.1021/acs.joc.1c00171
日期:2021.7.16
A transition metal-free method for de novo construction of diverse sulfonated pyrazoles from readily available sulfonyl hydrazides, 1,3-diketones, and sodiumsulfinates was established under mild conditions. Pyrazoles bearing two different sulfonyl groups were obtained in one step. The method features a diversity of substituents of the pyrazole products and a remarkably simple work-up.
[Ru(bpy)3]Cl2-catalyzed aerobic oxidative cleavage β-diketones to carboxylic acids under visible light irradiation
作者:Xiao-Yan Wang、Zhen-Peng Shang、Gao-Feng Zha、Xiao-Qing Chen、Syed Nasir Abbas Bukhari、Hua-Li Qin
DOI:10.1016/j.tetlet.2016.11.002
日期:2016.12
A mild and highly efficient method for the preparation of carboxylic acids is developed through a visible-light-mediated aerobic oxidative cleavage of β-diketones. This process provides a potential general, practical and scalable protocol for both laboratorysynthesis and industrial production of carboxylic acids in a green manner.