Qian, Jing Sheng, Guorong Huang, Kai Liu, Shaojie Lu, Ping Wang, Yanguang α‑Amidino Rhodium Carbenes: Key Intermediates for the Preparation of (<i>E</i>)‑2-Aminomethylene-3-oxoindoles and Pyranoindoles Rhodium-catalyzed reactions of 3-diazoindolin-2-imines with aromatic aldehydes and α,β-unsaturated aldehydes respectively furnished (<i>E</i>)-2-aminomethylene-3-oxoindoles and pyranoindoles in moderate to excellent yields with nice functional group tolerance. The reaction proceeds in a cascade involving α-amidino rhodium carbene as the key intermediate. amidino;pyranoindole;Rhodium;Carbene;diazoindolin;Aminomethylene;rhodium;reaction proceeds;Preparation;aminomethylene;Key Intermediates;group tolerance;Amidino;aldehyde;Pyranoindole;yield;cascade;carbene 2016-07-08
    https://acs.figshare.com/articles/journal_contribution/_Amidino_Rhodium_Carbenes_Key_Intermediates_for_the_Preparation_of_i_E_i_2-Aminomethylene-3-oxoindoles_and_Pyranoindoles/3474980
10.1021/acs.orglett.6b01728.s001