Synthesis of Pyrrole Derivatives through Functionalization of 3,4-Bis(lithiomethyl)dihydropyrroles
作者:José Barluenga、Francisco J. Fañanás、Roberto Sanz、José M. Ignacio
DOI:10.1002/ejoc.200390120
日期:2003.2
Bis(2-lithioallyl)amines 2, substituted at the doublebonds, undergo intramolecular carbolithiation of a lithiateddouble bond in different solvents to afford dilithiated dihydropyrroles 3. Treatment of these dianions with electrophiles allows the preparation of functionalized pyrrole derivatives 5 and 6. Interestingly, treatment of these dianions with carboxylic esters selectively affords either keto