N-bromobutanimide → Ethyl 4-amino-7-bromo-5-(4-nitrophenyl)pyrrolo[2,1-f][1,2,4]triazine-6-carboxylate

Participants

Reaction Conditions

Reaction Steps

Ethyl 4-amino-5-(4-nitrophenyl)pyrrolo[2,1-f][1,2,4]triazine-6-carboxylate (2.0 g, 6.11 mmol) was suspended in ACN and treated with N-bromosuccinimide (1.20 g, 6.72 mmol). The dark suspension was heated to 60° C. for 1 h. The suspension was cooled and filtered. The brown solid was washed with ACN and MeOH. The product was collected by filtration to give 2.06 g of a yellow brown solid (83%). 1H-NMR (DMSO-d6) δ 8.26 (d, J=8.8, 2H), 8.07 (s, 1H), 7.64 (d, J=8.8, 2H), 4.02 (q, J=7.0, 2H), 0.95 (t, J=7.0, 3H); MS [M+H]+=406.1, 408.0; LCMS RT=2.93.

Provenance & Evidence