Iron-catalyzed arylmethylation of sulfonyl acrylamides
作者:Jin-Tao Yu、Weiming Hu、Haibo Peng、Jiang Cheng
DOI:10.1016/j.tetlet.2016.07.105
日期:2016.9
A novel iron-catalyzed arylmethylation of activated alkenes was developed using di-tert-butyl peroxide (DTBP) as the methyl radical source. This cascade process involved the sequential methyl radical addition, 1,4-aryl migration, and desulfonylation of sulfonyl acrylamides to afford a variety of α-aryl-β-methyl amides in good to moderate yields.
A metal-free decarbonylative arylalkylation of N-(arylsulfonyl)acrylamides with aliphatic aldehydes as alkylating source was developed, providing a series of α-aryl-β-alkylamides in moderate to good yields. In this reaction, the concomitant alkylation, aryl migration and desulfonylation was involved.
Acid-catalyzed cascade radical addition/cyclization of arylacrylamides with ketones
作者:Xiao-Feng Xia、Su-Li Zhu、Minglu Zeng、Zhen Gu、Haijun Wang、Wei Li
DOI:10.1016/j.tet.2015.06.106
日期:2015.9
radical addition/cyclization of arylacrylamides with ketones was described. The reaction tolerates a series of functional groups, such as nitro, methoxyl, carbonyl, bromo, chloro, fluoro, and trifluoromethyl groups. γ-Peroxyketones were also prepared using N-arylsulfonyl-acrylamides as substrates under acid-catalyzed conditions.
Metal-free catalytic activation of inert C(sp3)–H/elimination of SO2/C–C bond formationviaa free radical process were achieved in sequence.
无金属催化激活惰性C(sp3)-H/ SO2消除/ C-C键形成通过自由基过程实现了顺序。
Arylphosphonylation and Arylazidation of Activated Alkenes
作者:Wangqing Kong、Estíbaliz Merino、Cristina Nevado
DOI:10.1002/anie.201311241
日期:2014.5.12
Two radical‐mediated processes of activatedalkenes, namely arylphosphonylation and arylazidation, are described. The difunctionalization of alkenes by a tandem process that involves radical addition, 1,4‐aryl migration, and desulfonylation generates α‐aryl‐β‐heterofunctionalized amides bearing a quaternarystereocenter when the substituent on the nitrogen atom is an aryl group. Alternatively, heterooxindoles