A method for the synthesis of amide‐containing molecules was developed using vinylazides as an enamine‐type nucleophile towards carbon electrophiles, such as imines, aldehydes, and carbocations that were generated from alcohols in the presence of BF3⋅OEt2. After nucleophilic attack of the vinylazide, a substituent of the resulting iminodiazonium ion intermediate migrates to form a nitrilium ion,
A new radical-mediated intramolecular arene C(sp2)-H amidation of 3-phenylpropanamides or [1,1'-biphenyl]-2-carboxamides was developed to prepare a series of 3,4-dihydro-2(1H)-quinolinone and phenanthridone derivatives in moderate to excellent yields (33-94%). Spirolactams could also be obtained using this protocol.
Silver-Catalyzed Decarboxylative Radical Addition/Cyclization of Oxamic Acids with Alkenes towards Quinolin-2-ones
作者:Gaofeng Feng、Chengan Jin、Jing-Yao He、Qi-Fan Bai
DOI:10.1055/s-0040-1707891
日期:2020.9
An efficient silver-catalyzed tandem decarboxylative radical addition/cyclization of oxamic acids with alkenes has been developed. This method provides a novel and straightforward protocol toward a variety of 4-aryl-3,4-dihydroquinolin-2(1H)-ones, 4-(α-carbonyl)-3,4-dihydroquinolin-2(1H)-ones, and quinolin-2(1H)-ones in aqueous solution.
In the presence of 3 equivalents of MeLi, various Grignard reagents reacted with secondary α,β-unsaturated amides and α,β-unsaturated carboxylic acids to give the corresponding Michael adducts in g...
Conjugate addition of organolithium reagents to acrylanilide anions
作者:Jack E. Baldwin、William A. Dupont
DOI:10.1016/s0040-4039(00)92805-3
日期:1980.1
Phenyllithium, -butyllithium, and -butyllithium were found to add to substituted acrylanilide anions to give the 1,4-addition products in fair to good yields.