Synthesis of the Indolo[2,3-a]quinolizidine Ring through the Addition of 2-Siloxyfurans to Imines and Intrinsic Reaction Coordinate Calculations - Mirabal-Gallardo, Yaneris; Soriano, Maria D. P. C.; Caballero, Julio; Alzate-Morales, Jans; Simirgiotis, Mario J.; Santos, Leonardo S. (Synthesis, 2012)