An approach toward the alkaloid (±)-mersicarpine using a rhodium(II) carbenoid cyclization–cycloaddition cascade of an α-diazo dihydroindolinone
作者:Hao Li、Bo Cheng、Nawong Boonnak、Albert Padwa
DOI:10.1016/j.tet.2011.09.118
日期:2011.12
A tandem carbonyl ylide/1,3-dipolar cycloaddition cascade of α-diazo indole-2,3-dione with several different dipolarophiles was investigated. The intermolecular Rh(II)-catalyzed reaction occurs efficiently and affords dipolar cycloadducts in high yields. The analogous intramolecularreaction also takes place and gives an azapolycyclic product derived from trapping of the carbonylylide dipole with