Phosphorus oxychloride → HCID 59594371, compound

Participants

Reaction Steps

In a 1 L 3 neck RBF equipped with magnetic stir bar, condenser and N2 inlet, 7-chloro-1-(4-methoxybenzyl)-3,4-dihydro-1H-benzo[e][1,4]diazepine-2,5-dione (45 g, 0.136 mol) was suspended in 400 mL of toluene. To this was added N,N-dimethylanaline (33 g, 0.272 mol) followed by the addition of POCl3 (23 g) and the reaction stirred for 3 min (RT). Reaction flask was placed into a 90° C. oil bath and the reaction mixture was heated for 5 h and then cooled. The reaction was quenched by adding 450 mL of ice water and stirred for 15 min. The organic layer was separated and quickly washed with cold water (2×250 mL) and brine (300 mL). Then, the organic layer was dried over MgSO4, filtered and concentrated on a rotary evaporator to give 57 g of black crude product. Crude product was used for next step with no further purification. Yield 87.5%.

Provenance & Evidence