Synthesis of Isatin 3-Oximes from 2-Nitroacetanilides
作者:Timothy Kearney、Philip A. Harris、Arthur Jackson、John A. Joule
DOI:10.1055/s-1992-26223
日期:——
2-Nitroacetanilides, prepared by alkaline hydrolysis of 1-arylamino-1-methylthio-2-nitroethenes, are converted into isatin (1H-indole-2,3-dione) 3-oximes by treatment with concentrated sulfuric acid or trifluoromethanesulfonic acid at room temperature.
Methyl Pyruvate Oxime as a Carbonyl Synthon: Synthesis of Ureas, Carbamates, Thiocarbamates, and Anilides
作者:Seo Yeon Kim、Hee Nam Lim
DOI:10.1021/acs.orglett.4c01007
日期:2024.5.10
strategy for the synthesis of unsymmetrical ureas, carbamates, thiocarbamates, and anilides was developed with methyl pyruvate oxime as the carbonyl synthon. The intrinsic reactivity of the reagent enabled consecutive disubstitution involving direct amidation and one-pot deoximative substitution with various nucleophiles. The utility of the method was demonstrated with the synthesis of bioactive molecules
Synthesis of <i>N</i>-Aryl Oxindole Nitrones through a Metal-Free Selective <i>N</i>-Arylation Process
作者:Si-Yi Wu、Xiao-Pan Ma、Cui Liang、Dong-Liang Mo
DOI:10.1021/acs.joc.6b02774
日期:2017.3.17
An efficient selective N-arylation of 3-(hydroxyimino)indolin-2-ones with diaryliodonium salts to prepare (Z)-N-aryl oxindole nitrones has been achieved under simple base-mediated conditions. The reaction tolerated a variety of diaryliodonium salts with diverse and sensitive functional groups. Studies on the oxime structures revealed that the pyrroline ring and carbonyl group in 3-(hydroxyimino)indolin-2-ones played important roles in the selective N-arylation process. The N-aryl oxindole nitrones could be prepared rapidly and easily at the gram scale.