A simple, efficient and environmentally benign protocol for the synthesis of methylenebisamides and carbinolamides in high yields from aromatic amides and formaldehyde in the presence of heterogeneous catalysts (Hβ and NaY zeolites) using water as a solvent is demonstrated. Moreover, the catalyst is recyclable and can be reused without significant loss in its catalytic activity.
One-Pot Anodic Conversion of Symmetrical Bisamides of Ethylene Diamine to Unsymmetrical <i>gem</i>-Bisamides of Methylene Diamine
作者:Tatiana Golub、Gui-yuan Dou、Cheng-chu Zeng、James Y. Becker
DOI:10.1021/acs.orglett.9b02917
日期:2019.10.4
Symmetrical bisamides of ethylene diamine of type ArCONHCH2CH2NHCOAr undergo anodic C-C bond cleavage in acetonitrile-LiClO4 under controlled-potential electrolysis. The electrogenerated carbocation intermediates react with the solvent acetonitrile to afford unsymmetrical gem-bisamides of type ArCONHCH2NHCOMe in a one-pot reaction. The yields of the latter products are moderate (up to 60%). Other minor
Synthesis of Methylenebisamides by TFA-Promoted Reactions of Nitriles and DMSO
作者:Lingxia Pan、Lin Huang、Chunsong Xie
DOI:10.2174/15701786113109990049
日期:2013.11
Under TFA promoted conditions, aryl and 2-pyridyl nitriles can react with DMSO, affording methylenebisamides
in moderate to good yields. While the electron-donating groups give good yields, the electron-withdrawing
groups provide lower yields.
A straightforward synthesis of methylenebisamides from amides and DMSO with a substoichiometric amount of (COCl)2
作者:Hao Wang、Sen Liang、Yutong Wang、Shuai Peng、Yongguo Liu、Baoguo Sun、Hongyu Tian、Ning Li
DOI:10.1016/j.molstruc.2022.133184
日期:2022.9
The preparation of methylenebisamides has been achieved by the reaction of amides with dimethyl sulfoxide (DMSO) in the presence of a substoichiometric amount of (COCl)2 in toluene at reflux. Various amides, including aliphatic and aryl amides, lactams, and carbamates, can be converted to the corresponding methylenebisamides in good to high yields. It is proposed that HCHO generated in situ from the