A Synthesis of 3-Hydroxy-5-methoxyphenanthro[4,5-bcd]furan

Abstract
3-Hydroxy-5-methoxyphenanthro[4,5-bcd]furan (Ia) was synthesized by the dehydrogenation of 5-methoxy-3-oxo-1,2,3,8,9,9a-hexahydrophenanthro(4,5-bcd)furan (IVa), starting from 8-hydroxy-7-methoxy-1-tetralone (IIb).