Synthesis of pyranonaphthoquinones Synthesis of rhinacanthone(1) and compound 8 were achieved starting from 1-hydroxy-2-naphthoic acid(14) via 1-naphthol derivative(20) (Scheme 1).
Synthesis of pyranonaphthoquinones Synthesis of rhinacanthone(1) and compound 8 were achieved starting from 1-hydroxy-2-naphthoic acid(14) via 1-naphthol derivative(20) (Scheme 1).