Iodine-Catalyzed Direct Olefination of 2-Oxindoles and Alkenes via Cross-Dehydrogenative Coupling (CDC) in Air
作者:Hong-Yan Huang、Hong-Ru Wu、Feng Wei、Dong Wang、Li Liu
DOI:10.1021/acs.orglett.5b01662
日期:2015.8.7
A direct intermolecular olefination of sp3 C–H bond between 2-oxindoles and simple alkenes via a Cross-Dehydrogenative Coupling (CDC) strategy has been developed. In the absence of additional base, moderate to excellent yields have been obtained by using a catalytic amount of iodine with atmospheric oxygen as the reoxidant. Based on the observation of a radical capture experiment, the transformation
A catalyst-free intermolecular <i>trans</i>-iodoalkylation of alkynes
作者:Jie-Jie Liu、Hong-Yan Huang、Liang Cheng、Qi Liu、Dong Wang、Li Liu
DOI:10.1039/c7ob03159a
日期:——
report the first catalyst-free and trans-selective iodoalkylation reaction of alkynes with a series of α-carbonyl compounds. This unprecedented three-component iodoalkylation reaction is enabled by using (iodoethynyl)trimethylsilane as a radical initiator and iodide source. The 1,2-difunctionalization affords alkenyl iodides, which are versatile building blocks for the construction of tri-substituted
Here, we explore the GO‐catalyzed cross‐dehydrogenativecoupling of oxindoles with arenes and thiophenols for the rapid synthesis of 3‐aryloxindoles and 3‐sulfenylated oxindoles. Control experiments and small‐molecule mimicking studies reveal that the acidic nature and quinone‐type functionalities of GO are synergistically utilized for the coupling reaction. The reaction proceeds under simple and mild
Fe<sup>III</sup>-Catalyzed Cross-Dehydrogenative Arylation (CDA) between Oxindoles and Arenes under an Air Atmosphere
作者:Hong-Ru Wu、Hong-Yan Huang、Chuan-Li Ren、Li Liu、Dong Wang、Chao-Jun Li
DOI:10.1002/chem.201502519
日期:2015.11.16
An efficient FeIII‐catalyzedcross‐dehydrogenative arylation (CDA) of 3‐substituted oxindoles with activated arenes under an air atmosphere was developed to provide 3,3′‐disubstituted oxindoles in good yields.
Cobalt-Catalyzed Peroxidation of 2-Oxindoles with Hydroperoxides
作者:De-Long Kong、Liang Cheng、Tao Yue、Hong-Ru Wu、Wei-Chun Feng、Dong Wang、Li Liu
DOI:10.1021/acs.joc.6b00622
日期:2016.7.1
A highly efficient and facile cobalt-catalyzed C–H activation and peroxidation of 2-oxindoles was reported, which provides a new pathway for the synthesis of biologically active 3-peroxy-2-oxindoles from readily available starting materials in excellent chemical yields. The resulting products could be further transformed into various substituted 3-peroxyoxindoles in good to excellent yields. The developed