A Facile Access to 4-Substituted-2-naphthols via a Tandem Friedel–Crafts Reaction: A β-Chlorovinyl Ketone Pathway
作者:Hun Young Kim、Kyungsoo Oh
DOI:10.1021/ol502951v
日期:2014.11.21
A one-pot synthesis of 2-naphthol derivatives is accomplished using a tandem Friedel–Crafts reaction sequence. The developed methodology allows for a concomitant construction of up to three C–C bonds between readily available alkynes and phenylacetyl chloride derivatives by an intermolecular Friedel–Crafts acylation of alkynes followed by an intramolecular Friedel–Crafts alkylation of β-chlorovinyl
Stable 2-(trimethylsilyl)phenyl trimethylsilyl ethers, readily obtained from the corresponding halogenated phenols in two steps, were identified as novel benzyne precursors. These species were converted to benzynes by a domino reaction of O-desilylation, O-nonaflylation, and β-elimination under mild conditions using nonafluorobutanesulfonyl fluoride (NfF) and tetrabutylammonium triphenyldifluorosilicate