Palladium-Catalyzed Hydroaminocarbonylation of Alkenes with Amines: A Strategy to Overcome the Basicity Barrier Imparted by Aliphatic Amines
作者:Guoying Zhang、Bao Gao、Hanmin Huang
DOI:10.1002/anie.201502405
日期:2015.6.22
A novel and efficient palladium‐catalyzed hydroaminocarbonylation of alkenes with aminals has been developed under mild reaction conditions, and allows the synthesis of a wide range of N‐alkyl linear amides in good yields with high regioselectivity. On the basis of this method, a cooperative catalytic system operating by the synergistic combination of palladium, paraformaldehyde, and acid was established
The weak acid has been identified as an efficient basicity-mask to overcome the basicitybarrierimparted by aliphaticamines in the Pd-catalyzed hydroaminocarbonylation, which enables both aromatic and aliphaticamines to be applicable in the palladium-catalyzedhydroaminocarbonylation reaction. Notably, by using this protocol, the marketed herbicide of Propanil and drug of Fentanyl could be easily
TiF<sub>4</sub>-catalyzed direct amidation of carboxylic acids and amino acids with amines
作者:Abdulkhaliq A. Alawaed、P. Veeraraghavan Ramachandran
DOI:10.1039/d3ob01943h
日期:——
Unlike other metal fluorides, catalytic titanium tetrafluoride enhances the direct amidation of aromatic and aliphatic carboxylicacids and N-protected amino acids in refluxing toluene. While aromatic acids were converted to amides with 10 mol% of the catalyst within 24 h, aliphatic acids underwent a faster reaction (12 h), with lower catalyst loading (5 mol%). This protocol is equally efficient with
Silyl Radical as an Isocyanide Transfer Agent for Giese-Type Reactions Involving Aliphatic Amines
作者:Yu-Qing Ma、Muliang Zhang、Shi-Kai Tian
DOI:10.1021/acs.orglett.4c01706
日期:2024.6.21
Herein we report silyl radicals serve as isocyanide transfer agents for Giese-type reaction from aliphaticamines and electron-deficient olefins. α-Primary, α-secondary, and sterically encumbered α-tertiary primary amines could be easily converted into isocyanides for coupling with electron-deficient olefins by employing latent silyl radicals under visible light irradiation. Notably, the abstraction