Selective cyclization of alkynols and alkynylamines catalyzed by potassium tert-butoxide
作者:Deng Yuan Li、Ke Ji Shi、Xiao Feng Mao、Zheng Le Zhao、Xin Yan Wu、Pei Nian Liu
DOI:10.1016/j.tet.2014.06.078
日期:2014.9
Solvent-Switched Benzylic Methylene Functionalization: Addition, Ring-Opening, Cyclization, and Unexpected Cleavage of C–O and C–C Bonds
作者:Deng Yuan Li、Xue Song Shang、Guo Rong Chen、Pei Nian Liu
DOI:10.1021/ol401470y
日期:2013.8.2
been achieved using imines as reagents and potassium tert-butoxide as the catalyst. Depending on the solvent used, the reaction proceeds by two pathways. In THF, an addition/elimination reaction of exo-cyclic enol ethers with imines provides dihydroisobenzofuranderivatives in good yield. In DMSO, an addition/ring-opening/cyclization cascade reaction occurs with unexpected cleavage of C–O and C–C bonds