[EN] A VERSATILE LIGAND FOR PALLADIUM-CATALYZED META-C-H FUNCTIONALIZATIONS<br/>[FR] LIGAND POLYVALENT POUR DES FONCTIONNALISATIONS DE MÉTA-C-H CATALYSÉES PAR DU PALLADIUM
申请人:SCRIPPS RESEARCH INST
公开号:WO2017184589A1
公开(公告)日:2017-10-26
A class of mono-protected 3-amino-2- hydroxypyridine (MPAHP) ligands that enable the meta- C-H arylation of anilines, phenols, phenylacetic acids, and biologically relevant heterocyclic compounds using norbornene as a transient mediator is disclosed. The applicability of this meta-arylation methodology in the pharmaceutical industry is illustrated for heteroaryl substrates and heteroaryl iodide coupling partners, a feat made possible by using the MPAHP ligand. The enabling nature of MPAHP ligands to achieve other meta-C-H functionalization processes is also illustrated by the development of a meta-C-H amination reaction and a meta-C-H alkynylation reaction.
4-Dodecylbenzenesulfonic acid (DBSA) promoted solvent-free diversity-oriented synthesis of primary carbamates, S-thiocarbamates and ureas
作者:Ali Reza Sardarian、Iman Dindarloo Inaloo
DOI:10.1039/c5ra14528g
日期:——
A simple and efficient solvent-free preparation of primary carbamates,S-thiocarbamates and ureas from alcohols, phenols, thiols and amines in the presence of 4-dodecylbenzenesulfonic acid, as a cheap and green Brønsted acid, has been described.
Rhodium(II)-Catalyzed Undirected and Selective C(sp<sup>2</sup>)–H Amination en Route to Benzoxazolones
作者:Ritesh Singh、Kommu Nagesh、Matam Parameshwar
DOI:10.1021/acscatal.6b02237
日期:2016.10.7
promote the activation and cyclization of arylcarbamate substrates to yield benzoxazolones via an intramolecular nitrene C–H insertion reaction. Investigation of the substrate scope shows that the reaction undergoes selective aromatic C(sp2)—H amination over more labile o-C(sp3)—Hbonds. Observation of inverse secondary KIE (PH/PD = 0.42 ± 0.03) indicates involvement of aromatic electrophilic substitution
铑(II)可以通过分子内的氮杂C–H插入反应有效地促进芳基氨基甲酸酯底物的活化和环化,从而生成苯并恶唑啉酮。对底物范围的研究表明,该反应在更不稳定的o -C(sp 3)-H键上进行了选择性芳族C(sp 2)-H胺化反应。反向二次KIE的观察结果(P H / P D = 0.42±0.03)表明,芳族亲电取代机理参与了芳基CH酰胺化反应。
New compounds, their preparation and use
申请人:——
公开号:US20020010171A1
公开(公告)日:2002-01-24
The present invention relates to compounds of the general formula (I)
1
The compounds are useful in the treatment and/or prevention of conditions mediated by nuclear receptors, in particular the Peroxisome Proliferator-Activated Receptors (PPAR).
structurally diverse compounds containing a hydroxyl group has been performed in high yields and purity, and without any epimerization undersolvent-freeconditions using HClO4–SiO2 as a mild, convenient, and effective reagent. The procedure is operationally simple, efficient, and environmentally benign.