An FeCl2-promoted carbomethylation of arylacrylamides by di-tert-butyl peroxide (DTBP) is achieved, leading to 3-ethyl-3-substituted indolin-2-one in high yield. The reaction tolerates a series of functional groups, such as cyano, nitro, ethyloxy carbonyl, bromo, chloro, and trifluoromethyl groups. The radical methylation and arylation of the alkenyl group are involved in this reaction.
Silver-Catalyzed Carboazidation of Arylacrylamides
作者:Xiao-Hong Wei、Ya-Min Li、An-Xi Zhou、Ting-Ting Yang、Shang-Dong Yang
DOI:10.1021/ol402138y
日期:2013.8.16
inexpensive method of nontoxic, silver-salt-catalyzed carboazidation of arylacrylamides to afford corresponding azide oxindoles is reported. This reaction system exhibits great functional group tolerance. All products form a crucial skeleton for the synthesis of various indole alkaloids.
Iron-catalyzed aerobic difunctionalization of alkenes: a highly efficient approach to construct oxindoles by C–S and C–C bond formation
作者:Tao Shen、Yizhi Yuan、Song Song、Ning Jiao
DOI:10.1039/c4cc00401a
日期:——
A novel iron-catalyzed efficient approach to construct sulfone-containing oxindoles, which play important roles in the structural library design and drug discovery, has been developed. The use of readily available benzenesulfinic acids, an inexpensive iron salt as the catalyst, and air as the oxidant makes this sulfur incorporation protocol very efficient and practical.
A tethering directing group strategy for ruthenium-catalyzed intramolecular alkene hydroarylation
作者:Praveen Kilaru、Sunil P. Acharya、Pinjing Zhao
DOI:10.1039/c7cc08704g
日期:——
N-heterocycle synthesis that utilizes an alkene-tethered amide moiety as a directing group for aromatic C–H activation. This tethering directing group strategy is demonstrated in a ruthenium-catalyzed intramolecular alkene hydroarylation with N-aryl acrylamides to form oxindole products.
Synthesis of CF2H-containing oxindoles via photoredox-catalyzed radical difluoromethylation and cyclization of N-arylacrylamides
作者:Mei Zhu、Qingqing You、Rongxia Li
DOI:10.1016/j.jfluchem.2019.109391
日期:2019.12
difluoromethylation/cyclization of N-aryl acrylamides using difluoromethyl benzo[d]-thiazol-2-yl sulfone as the difluoromethylating reagent has been developed under mild conditions. This approach allows the synthesis a variety of useful CF2H-containing oxindoles in good to excellent yields. In addition, the photocatalytic difluoromethylation of methacryloyl benzamides and ortho-cyanoarylacrylamides via a similar