An Efficient One-Pot Synthesis of Pyrrolo[4,3,2-ij]isoquinoline Derivatives by a Consecutive Aza-Wittig/Electrocyclic Ring-Closure/Intramolecular Acylation Process
An Efficient One-Pot Synthesis of Pyrrolo[4,3,2-ij]isoquinoline Derivatives by a Consecutive Aza-Wittig/Electrocyclic Ring-Closure/Intramolecular Acylation Process
An Efficient One-Pot Synthesis of Pyrrolo[4,3,2-<i>ij</i>]isoquinoline Derivatives by a Consecutive Aza-Wittig/Electrocyclic Ring-Closure/Intramolecular Acylation Process
作者:Pedro Molina、Mateo Alajarín、Angel Vidal
DOI:10.1055/s-1992-26095
日期:——
Iminophosphorane, ethyl 5-ethoxycarbonyl-2-methoxy-α-[(triphenylphosphoranylidene) amino]cinnamate (4) reacts with aliphatic and aromatic isocyanates in toluene at 170°C to give directly the corresponding pyrrolo[4,3,2-ij]isoquinolines 8 in moderate yields.