Palladium‐catalyzed trifluoromethylthiolation of chelation‐assisted C–Hbonds has been accomplished by employing a readily accessible electrophilic trifluoromethylthiolating reagent.
螯合辅助CH键的钯催化三氟甲基硫醇化反应是通过使用易于获得的亲电子三氟甲基硫醇化试剂完成的。
TBHP/Cu(OAc)<sub>2</sub> mediated oxidation of pyrazolines: A convenient method for the preparation of pyrazoles
Abstract An efficient and simple oxidative protocol has been developed for the preparation of pyrazoles from pyrazolines mediated by TBHP/Cu(OAc)2 at room temperature. The present protocol has been successfully applied for the preparation of various pyrazole compounds from heterocyclic pyrazolines.
Compounds for the treatment of inflammatory diseases
申请人:ANDERSKEWITZ Ralf
公开号:US20100190767A1
公开(公告)日:2010-07-29
Compounds of formula 1 and hetero derivatives thereof
and the pharmacologically acceptable salts, enantiomers, racemates, hydrates, or solvates thereof, which are suitable for the treatment of respiratory or gastrointestinal complaints or diseases, inflammatory diseases of the joints, skin, or eyes, diseases of the peripheral or central nervous system or cancers, as well as pharmaceutical compositions which contain these compounds.
Intramolecular oxidative C–N bond formation under metal-free conditions: One-pot global functionalization of pyrazole ring
作者:Mohit K. Tiwari、Ashif Iqubal、Parthasarathi Das
DOI:10.1016/j.tet.2022.133059
日期:2022.11
of intermediate free-radical species followed by intramolecular oxidative C–N bondformation afforded the desired pyrazole moiety. The synthetic versatility of this methodology is further highlighted by preparing a diverse range of substrates including di-/tri-/and tetra-substituted pyrazoles, and applying the methodology in the practical synthesis of bioactive scaffolds.
An Oxone-mediated transition-metal-free oxidative C-N bond formation has been achieved for the regio-selective synthesis of substituted pyrazoles. The reactions accompany the chelation-controlled ortho-oxidation of N-substituted aromatic ring to provide phenol derivatives in some cases. This method displays a facile access to diverse range of substituted pyrazoles from readily accessible hydrazones. (C) 2015 Elsevier Ltd. All rights reserved.