New pyrazolones as 11b-HSD1 inhibitors for diabetes
申请人:Amrein Kurt
公开号:US20070049574A1
公开(公告)日:2007-03-01
Compounds of formula
as well as pharmaceutically acceptable salts and esters thereof, wherein R
1
to R
4
have the significance given in claim
1
can be used in the form of pharmaceutical compositions.
Synthesis of Selenopyrano[2,3-c]pyrazol-4(1H)-ones and Their C–H Activation
作者:Hitesh B. Jalani、Jin-Hyun Jeong、In-Hui Choi
DOI:10.1055/a-1296-8835
日期:2021.2
3-c]pyrazol-4(1H)-ones and their aryl derivatives for the first time using seleno-pyran ring formation via an in situ generated selenide reacting directly with α-halo-β-ynones bearing substituted pyrazoles to provide concomitant selenopyrano[2,3-c]pyrazol-4(1H)-ones. Subsequent direct C–H arylation of the later compounds effected by palladium catalyzed Heck reaction enables the incorporation of arene
SO<sub>2</sub>F<sub>2</sub> mediated transformation of pyrazolones into pyrazolyl fluorosulfates
作者:Jing Leng、Hua-Li Qin
DOI:10.1039/c9ob00903e
日期:——
The construction of a class of novel N-heterocyclic molecules containing both pyrazole and fluorosulfate functionalities was achieved through the reactions of pyrazolones with SO2F2 in good to excellent yields. The fluorosulfate moieties were utilized as versatile building blocks in the Suzuki coupling reaction and SuFEx click chemistry.
通过吡唑啉酮与SO 2 F 2的反应,以良好至极好的收率,可以实现一类同时具有吡唑和氟硫酸盐官能团的新型N-杂环分子的构建。在Suzuki偶联反应和SuFEx click化学中,氟代硫酸盐部分被用作通用的结构单元。
A Convenient Microwave-Assisted Propylphosphonic Anhydride (T3P<sup>®</sup>) Mediated One-Pot Pyrazolone Synthesis
This paper describes a facile, efficient, and clean synthesis of various pyrazolones by employing T3P® as a catalyst and performing the reaction under microwave irradiation. This two-step, one-pot reaction proceeded readily and tolerated a variety of functional groups. A wide range of pyrazolone derivatives were obtained in good to excellent yields.
Rhodium‐Catalyzed [4+2] Annulation of N‐Aryl Pyrazolones with Diazo Compounds To Access Pyrazolone‐Fused Cinnolines
作者:Chih‐Yu Lin、Wan‐Wen Huang、Ying‐Ti Huang、Sandip Dhole、Chung‐Ming Sun
DOI:10.1002/ejoc.202101005
日期:2021.9.21
An efficientsynthesis of novel dinitrogen-fused heterocycles, such as pyrazolo[1,2-a]cinnoline derivatives, has been accomplished by the rhodium(III)-catalyzed reaction of N-arylpyrazol-5-ones with diazo compounds. This reaction proceeds through a cascade C−H activation/intramolecular cyclization under mild reaction conditions and features a broad substrate scope.
新型二氮稠合杂环的有效合成,例如吡唑并[1,2- a ]肉啉衍生物,已通过铑(III)催化的N-芳基吡唑-5-酮与重氮化合物的反应完成。该反应在温和的反应条件下通过级联 CH 活化/分子内环化进行,具有广泛的底物范围。