Without using any additives, a practical and eco-friendly methodology has been realized for the tandem double cyclization of 1,6-dienes with easily accessible azobis(alkylcarbonitriles) on water.
Metal-free oxidative tandem coupling of activated alkenes with carbonyl C(sp2)–H bonds and aryl C(sp2)–H bonds using TBHP
作者:Ming-Bo Zhou、Ren-Jie Song、Xuan-Hui Ouyang、Yu Liu、Wen-Ting Wei、Guo-Bo Deng、Jin-Heng Li
DOI:10.1039/c3sc50810b
日期:——
A metal-free oxidative tandem coupling of activatedalkenes with carbonyl C(sp2)–H bonds and arylC(sp2)–H bonds using TBHP is established for the synthesis of 3-(2-oxoethyl)indolin-2-ones. This method allows 1,2-difunctionalization of the C–C double bond in N-arylacrylamides by simultaneous formation of two C(sp2)–C(sp3) bonds.
A concise and eco-friendly acylation/cyclization of 1,6-dienes with linear ethers under catalyst- and base-free conditions has been developed. tert-Butyl hydroperoxide (TBHP)-promoted tandem cleavage of C(sp3)–H and C(sp3)–O bonds of linear ethers is the key in this process, which provides a straightforward and efficient method to realize acylation reaction. The significant advantages of this method