Synthesis of 3-amino-3,4-dihydro-1H-quinolin-2-ones through regioselective palladium-catalyzed intramolecular cyclization
作者:François Hallé、Olivier Van der Poorten、Christelle Doebelin、Marie Niederst、Séverine Schneider、Martine Schmitt、Steven Ballet、Frédéric Bihel
DOI:10.1016/j.tetlet.2016.02.094
日期:2016.4
In this Letter we explored the regioselective cyclization of 2-bromophenylalanine derivatives to access enantiopure dihydroquinolinones via an intramolecular regioselective Buchwald–Hartwig cyclization using Pd2(dba)3/XPhos as a catalytic system in the presence of BTPP as organic base. This procedure represents a promising strategy for the direct synthesis of bridged Phe-Xaa dipeptides.