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Beilstein J. Org. Chem. 2017, 13, 1032–1038, doi:10.3762/bjoc.13.102
Graphical Abstract
Figure 1: Sites of electrophilic attack in 1 and 2.
Scheme 1: Triflic acid promoted reaction of 2 with iso(thio)cyanates.
Scheme 2: Triflic acid promoted reaction of 2 with ethoxycarbonyl isothiocyanate.
Figure 2: Molecular structure of 4.
Scheme 3: Friedel–Crafts acylation of 2.