Selective catalytic Hofmann N-alkylation of poor nucleophilic amines and amides with catalytic amounts of alkyl halides
作者:Qing Xu、Huamei Xie、Er-Lei Zhang、Xiantao Ma、Jianhui Chen、Xiao-Chun Yu、Huan Li
DOI:10.1039/c6gc00938g
日期:——
A selective Hofmann N-alkylation reaction of amines/amides catalytic in alkylhalides is achieved by using alcohols as the alkylating reagents, affording mono- or di-alkylated amines/amides in high selectivities.
Innovative approach for the synthesis of N-substituted amides from nitriles and alcohols using propylphosphonic anhydride (T3P<sup>®</sup>) under solvent-free conditions
作者:Hassan A. Swarup、Nagaraju Chaithra、Nagarakere C. Sandhya、Shobith Rangappa、Kempegowda Mantelingu、Kanchugarakoppal S. Rangappa
DOI:10.1080/00397911.2019.1616761
日期:2019.8.18
developed from nitriles and alcoholsusing propylphosphonic anhydride (T3P®). This methodology is an alternate approach to the synthesis of amides via Ritter reaction, which is one of the classical methods for the synthesis of N-substituted amidesfrom nitriles and alcohols. In this approach, first T3P® activates the alcohol which is then attacked by nitrile to form N-substituted amides. This methodology
Mn-Catalyzed oxidative amination of benzylic C(sp3)–H bonds with nitriles is disclosed, which enables the synthesis of a broad range of secondary amides in moderate to excellent yields under mild conditions. The interaction between Mn(III) and DDQ facilitates the oxidation and makes it highlyefficient and selective.
Reactions between various benzyl alcohols or tert-butyl alcohol and nitriles were carried out in the presence of catalytic amounts (usually 10–20 mol-%) of o-benzenedisulfonimide as a Bronsted acidcatalyst; the reaction conditions were mild and the yields of amides were good. The catalyst was easily recovered and purified, ready to be used in further reactions, with economic and ecological advantages
Polyvinylpolypyrrolidone-supported boron trifluoride: a high-loaded, polymer-supported Lewis acid for the Ritter reaction
作者:Moslem Mansour Lakouraj、Masoud Mokhtary
DOI:10.1007/s00706-008-0007-4
日期:2009.1
AbstractA Mild and efficient method for preparing amides by reaction of nitriles with benzhydrol and tertiary alcohols is described using polyvinylpolypyrrolidone-supported borontrifluoride. Selective amidation of benzhydrol in the presence of primary benzyl alcohols was also achieved. Graphical abstract