Palladium-catalyzed heteroallylation of unactivated alkenes – synthesis of citalopram
作者:Joanne F. M. Hewitt、Lewis Williams、Pooja Aggarwal、Craig D. Smith、David J. France
DOI:10.1039/c3sc51222c
日期:——
A palladium-catalyzed difunctionalization of unactivated alkenes with tethered nucleophiles is reported. The versatile reaction occurs with simple allylic halides and can be carried out under air. The methodology provides rapid access to a wide array of desirable heterocyclic targets, as illustrated by a concise synthesis of the widely prescribed antidepressantcitalopram.
chemistry is reported. Both phenol and aromatic or aliphatic acid derivatives could be used under operator-friendly conditions (room temperature, technical solvents, under air). The discovery of the superiority of benziodoxolone-derived hypervalent iodine reagent 3d as an alkyne transfer reagent further expands the rapidly increasing utility of hypervalent iodine reagents in catalysis and is expected