N-Heterocyclic carbene–chromium-catalyzed alkylative cross-coupling of benzamide derivatives with aliphatic bromides
作者:Jinghua Tang、Pei Liu、Xiaoming Zeng
DOI:10.1039/c8cc05026k
日期:——
Described here is a chromium-catalyzed alkylative cross-coupling of benzamide derivatives with aliphatic electrophiles under mild conditions. This reaction was promoted by a low-cost and air-stable chromium(III) chloride salt combined with an N-heterocyclic carbene ligand and phenylmagnesium bromide as a reductant, and probably occurred with low-valent chromium involved in the catalytic cleavage of
Rh-Catalyzed General Method for Directed C–H Functionalization via Decarbonylation of <i>in-Situ</i>-Generated Acid Fluorides from Carboxylic Acids
作者:Bangyue He、Xiaojie Liu、Hongyi Li、Xiaofeng Zhang、Yuxi Ren、Weiping Su
DOI:10.1021/acs.orglett.1c01103
日期:2021.6.4
decarbonylative C–H coupling of in-situ-generated acid fluorides with amide substrates bearing ortho-Csp2–H bonds has been developed. This method enables alkyl, aryl, and alkenyl carboxylicacids to undergo decarbonylative coupling with C–H bonds of (hetero)aromatic or alkenyl amides in generally good yields via the in situ conversion of carboxylicacids into acid fluorides and also allows for the functionalization
Alkenes and arenes possessing a bidentate directing group are alkylated with a primary or secondary alkylzinchalide in the presence of an iron/diphosphine catalyst and a dichloroalkane oxidant. Acrylamides, including unsubstituted and monosubstituted ones, react stereoselectively. Under these reaction conditions, β‐hydrogen elimination and homocoupling of the organometallic reagent are largely suppressed
The Nickel(II)-Catalyzed Direct Benzylation, Allylation, Alkylation, and Methylation of C–H Bonds in Aromatic Amides Containing an 8-Aminoquinoline Moiety as the Directing Group
Direct alkylation via the cleavage of the ortho C–H bonds by a nickel-catalyzed reaction of aromaticamides containing an 8-aminoquinoline moiety as the directing group with alkyl halides is report...
Rhodium-Catalyzed Alkylation of C–H Bonds in Aromatic Amides with Styrenes via Bidentate–Chelation Assistance
作者:Kaname Shibata、Takuma Yamaguchi、Naoto Chatani
DOI:10.1021/acs.orglett.5b01682
日期:2015.7.17
Rhodium-catalyzed alkylation reactions of aromatic C–H bonds in aromatic amides with styrene derivatives have been developed by using an 8-aminoquinoline as a bidentate directing group. C–C bond formation selectively occurred between the ortho C–H bonds in aromatic amides and the terminal carbon of the styrene derivatives. The presence of an 8-aminoquinoline moiety is essential for the success of the