Journal of Heterocyclic Chemistry p. 605 - 608 (1989)
Update date:2022-08-03
Topics:
Kuo
Wu
Huang
Wu
Huang
Chou
Furo[2,3-b]chromone (1a) was conveniently prepared by the PPE-promoted cyclization of 5-[2'-carboxy-phenoxy)furan-2-carboxylic acid (8) which was made from methyl salicylate and ethyl 5-nitrofuran-2-carboxylate. Furo[2,3-b]chromon-2-acrylic acid (13) was
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