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.
The selective condensation of pyrazolones to isatins in aqueous medium
作者:Yong Zhang、Long-Jun Nie、Liang Luo、Jia-Xin Mao、Jin-Xiang Liu、Guo-Hai Xu、Deliang Chen、Hai-Qing Luo
DOI:10.1016/j.tet.2019.130916
日期:2020.2
The selective condensation of pyrazolones with isatins using water as the reaction medium is presented. This strategy provides an environmentally benign synthetic route to synthesize various potentially bioactive pyrazolone substituted oxindoles.
Ruthenium(II)-Catalyzed Oxidative Double C–H Activation and Annulation Reaction: Synthesis of Indolo[2,1-<i>a</i>]isoquinolines
作者:Somadrita Borthakur、Bipul Sarma、Sanjib Gogoi
DOI:10.1021/acs.orglett.9b02871
日期:2019.10.4
The first metal-catalyzed double aryl C(sp2)-H bond activation of antipyrine and alkyne annulation reaction is reported. This Ru(II)-catalyzed reaction was accomplished in the presence of 20 mol % phosphine ligand tricyclohexylphosphine tetrafluoroborate to afford indolo[2,1-a]isoquinolines that are very important compounds because of their bioactivity and interesting optical properties.
Gold(<scp>i</scp>)- and rhodium(<scp>iii</scp>)-catalyzed formal regiodivergent C–H alkynylation of 1-arylpyrazolones
作者:Xueli Wang、Xingwei Li、Yao Zhang、Lixin Xia
DOI:10.1039/c8ob00585k
日期:——
Formal regiodivergent C–H alkynylation of 1-aryl-5-pyrazolones has been realized under the catalysis of Rh(III) and Au(I) complexes by using a hypervalent iodine reagent as the alkyne source. Mechanistic studies indicate that the regioselectivity is ascribed to not only the choice of the catalyst but also the nature of the substrate. The substrate scope and functional group compatibility have been