(NZ)-N-(2-bromofluoren-9-ylidene)hydroxylamine → HCID 178517106, compound

Participants

Reaction Conditions

Reaction Steps

To the solid product from Step 1, (9Z)-2-bromo-9H-fluoren-9-one oxime (106 mg, 0.387 mmol) was added polyphosphoric acid (5 g). The mixture was then heated to 185° C. for 2 h. After cooling to r.t., water was added and the resulting solid was collected by filtration to give a 1:1 mixture of the title compounds and the regioisomeric 3-bromophenanthridin-6-ol. LRMS (M+H)+=274.2.

Provenance & Evidence