Beilstein J. Org. Chem.2018,14, 345–353, doi:10.3762/bjoc.14.22
transformed into 4-phenylcoumarin derivatives bearing C–H, C–S, C–N, and C–C bonds at 3-position.
Keywords: 3-aryl-2-propynoic acid; bromo-cyclization; coumarin; diaryliodonium triflate; O-phenylation; Introduction
Coumarin is a benzo-α-pyrone and one of the typical heterocyclic compounds. The importance of
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Graphical Abstract
Scheme 1:
One-pot preparation of 4-aryl-3-bromocoumarins 3 from 3-aryl-2-propynoic acids 1 with diphenyliodon...