Synthesis of Oxindoles by Iron-Catalyzed Oxidative 1,2-Alkylarylation of Activated Alkenes with an Aryl C(sp<sup>2</sup>)H Bond and a C(sp<sup>3</sup>)H Bond Adjacent to a Heteroatom
作者:Wen-Ting Wei、Ming-Bo Zhou、Jian-Hong Fan、Wei Liu、Ren-Jie Song、Yu Liu、Ming Hu、Peng Xie、Jin-Heng Li
DOI:10.1002/anie.201210029
日期:2013.3.25
Difunctionalization: Inexpensive and environmentally benign FeCl3 catalyzes the oxidative 1,2‐alkylarylation of activatedalkenes with an aryl C(sp2)Hbond and a C(sp3)Hbond adjacent to a heteroatom. This reaction is a new strategy for the synthesis of oxindoles and makes use of DBU as ligand and TBHP as oxidant (see scheme, TBHP=tert‐butyl hydrogenperoxide).
rapid microwave-assisted approach for the synthesis of phenanthridine derivatives from the radical insertion/cyclization reaction of biphenyl isocyanides with a C(sp3)–H bond adjacent to a heteroatom has been developed. The protocol achieves wide substrate scope and good to excellent yields. The kinetic isotope effect (KIE) studies, radical inhibition studies, and Hammett plot analysis clearly disclose
Bicyclo[1.1.1]pentanes (BCPs), which can serve as bioisosteres of para-disubstituted benzene rings, have emerged as useful bioactive scaffolds in drug discovery research. Herein, we report a one-step, light-promoted, three-component radical-coupling method for rapidly generating difunctionalized benzylalcohol-, aldehyde-substituted BCPs from aryl aldehydes, ethers, and [1.1.1]propellane. The method