N-Heterocyclic carbene-catalyzed highly enantioselective synthesis of substituted dihydropyranopyrazolones
作者:Han-Ming Zhang、Hui Lv、Song Ye
DOI:10.1039/c3ob41455h
日期:——
Highly optically pure multisubstituted dihydropyrano[2,3-c]pyrazol-6-(1H)-ones were synthesized via the N-heterocyclic carbene-catalyzed enantioselective [4 + 2] annulation of α-chloroaldehydes and pyrazolone-derived oxodienes.