Ruthenium(II)-catalyzed Arylation of <i>ortho</i>-C–H Bonds in 2-Aroyl-imidazoles with Aryl Halides
作者:Chen-an Wang、Naoto Chatani
DOI:10.1246/cl.200886
日期:2021.4.5
The ruthenium(II)-catalyzed ortho-C−H arylation of 2-aroyl-imidazoles with aryl bromides and chloride is reported. An imidazole ring functions both as a masked ester and a directing group for C−H activation. A variety of functional groups are tolerated under the reaction conditions. The arylated final products could be easily converted into the corresponding esters and amide.
Regel,E.; Buechel,K.-H., Justus Liebigs Annalen der Chemie, 1977, p. 145 - 158
作者:Regel,E.、Buechel,K.-H.
DOI:——
日期:——
REDUCTION OF 1,3-AZOLE AND 1,3-BENZAZOLE CARBINOLS WITH SODIUM BOROHYDRIDE-TRIFLUOROACETIC ACID
作者:Charles F. Nutaitis、Judy Obaza-Nutaitis
DOI:10.1080/00304949709355204
日期:1997.6
Ir(III)-Catalyzed C(sp<sup>2</sup>)–H Amidation of 2-Aroylimidazoles with 2,2,2-Trichloroethoxycarbonyl Azide (TrocN<sub>3</sub>)
作者:Sanjit K. Mahato、Tianhao Zhang、Naoto Chatani
DOI:10.1021/acs.joc.2c02056
日期:2022.12.16
2-trichloroethyl azide (TrocN3) as an amidating reagent is reported. The reaction proceeds smoothly, even at room temperature, and various important functional groups are tolerated. The results of deuterium-labeling experiments indicate that C–H bond cleavage is irreversible and does not appear to be the rate-determining step. The presence of an electron-donating group on the phenyl ring in the 2-aroylimidazole
Base-Promoted Amidation and Esterification of Imidazolium Salts via Acyl C–C bond Cleavage: Access to Aromatic Amides and Esters
Imidazolium salts have been effectively employed as suitable acyl transfer agents in amidation and esterification in organic synthesis. The weak acyl C(O)–C imidazolium bond was exploited to generate acyl electrophiles, which further react with amines and alcohols to afford amides and esters. The broad substrate scope of anilines and benzylic amines and base-promoted conditions are the benefits of