Concise synthesis of aromatic tertiary amines via a double Petasis–borono Mannich reaction of aromatic amines, formaldehyde, and organoboronic acids
作者:Jiayi Wang、Pinzhen Li、Qiaoying Shen、Gonghua Song
DOI:10.1016/j.tetlet.2014.03.131
日期:2014.7
A simple and efficient strategy to construct aromatictertiary amines via a double Petasis–borono Mannich reaction of aromatic amines, formaldehyde, and organoboronic acids has been developed. The transformation provides a useful method for the synthesis of amine derivatives.
single and dual reductiveamination followed by N-methylation of aldehydes and ketones to synthesize N,N-dimethyl as well as N-methyl tertiary amines, respectively, utilizing ammonium formate and methanol as N1 and C1 sources is reported. The protocol was efficiently extended to a tandem reductiveamination/N-methylation/cyclization of keto acids/esters leading to N-methyl lactams. A broad substrate