Water → HCID 15712516, compound

Participants

Reaction Steps

A mixture of 8-fluoro-1,2,3,9-tetrahydro-9-methyl-4H-carbazol-4-one oxime (1.8 g) and polyphosphoric acid (ca. 20 ml) in dioxan (30 ml) was stirred under nitrogen at 100°-110° for 1 h. After cooling, the reaction mixture was poured into iced water (1 l) and the resulting suspension was extracted with dichloromethane. The organic extract was concentrated in vacuo to give a solid which was taken up in methanol and adsorbed onto silica. Purification by FCC eluting with System A (200:8:1) gave the title compound (850 mg), m.p. 233°-235°.

Provenance & Evidence