Metal-Free Direct Trifluoromethylation of Activated Alkenes with Langlois’ Reagent Leading to CF<sub>3</sub>-Containing Oxindoles
作者:Wei Wei、Jiangwei Wen、Daoshan Yang、Xiaoxia Liu、Mengyuan Guo、Ruimei Dong、Hua Wang
DOI:10.1021/jo500515x
日期:2014.5.2
A metal-free and cost-effective synthesis protocol has been initially proposed for the construction of CF3-containing oxindoles via the direct oxidative trifluoromethylation of activated alkenes with Langlois’ reagent (CF3SO2Na). The present methodology, which utilizes very cheap CF3 reagent and a simple oxidant, provides a convenient and practical approach to CF3-containing oxindoles with a wide variety
最初已经提出了一种无金属且具有成本效益的合成方案,用于通过用Langlois试剂(CF 3 SO 2 Na)对活化的烯烃进行直接氧化三氟甲基化来构建含CF 3的羟吲哚。本方法利用非常便宜的CF 3试剂和简单的氧化剂,为含有CF 3的具有多种官能团的羟吲哚提供了方便实用的方法。
Palladium-Catalyzed Oxidative Difunctionalization of Alkenes with α-Carbonyl Alkyl Bromides Initiated through a Heck-type Insertion: A Route to Indolin-2-ones
作者:Jian-Hong Fan、Wen-Ting Wei、Ming-Bo Zhou、Ren-Jie Song、Jin-Heng Li
DOI:10.1002/anie.201402893
日期:2014.6.23
palladium‐catalyzed oxidative difunctionalization reaction of alkenes with α‐carbonyl alkyl bromides is described, in which the σ‐alkyl palladium(II) intermediate is generated through a Heck insertion and trapped using an aryl C(sp2)H bond. This method can be applied to various α‐carbonyl alkyl bromides, including primary, secondary, and tertiary α‐bromoalkyl esters, ketones, and amides.
Copper-catalyzed cyanoalkylarylation of activated alkenes with AIBN: a convenient and efficient approach to cyano-containing oxindoles
作者:Wei Wei、Jiangwei Wen、Daoshan Yang、Mengyuan Guo、Laijin Tian、Jinmao You、Hua Wang
DOI:10.1039/c4ra09022e
日期:——
A novel, simple, and cost-effective protocol has been developed for the construction of cyano-containing oxindoles by copper-catalyzed direct cyanoalkylarylation of activated alkenes with AIBN.
Tandem radical cyclization to construct poly-brominated 2-oxindoles
作者:Fengjuan Chen、Yajun Wang、Shijun Zhao、Wei Jiang、Congde Huo
DOI:10.1039/c7ob01859b
日期:——
Catalyticamounts of TBHP (15 mol %) promoted tribromomethylation of activated alkenes has been developed. This method provided a metal-free aerobic way to construct poly-brominated 2-oxindoles from reaction of readily available N-arylacrylamides with CBr4 via a proposed tandem radical cyclization process. Air is used as an efficient terminal oxidant in this transformation. The formation of the 1,1-dibromoolefin
A novel strategy for incorporating a trifluoroacetyl functionality into a range of structurally varied unsaturated bonds was developed by using PhI(OCOMe)2 as an oxidant with a masked trifluoroacyl reagent as a trifluoroacetyl radicalprecursor. The oxidative decarboxylation of the masked trifluoroacyl precursor followed by a tandem radical process provides versatile access to 5-exo-trig cyclization