Ammonia → HCID 67816157, compound

Participants

Reaction Steps

8 ml of phosphoryl chloride were added to 0.75 g (1.703 mmol) of the compound from Example 75A, and the mixture was stirred at RT overnight. The reaction mixture was then taken up in 120 ml of acetonitrile and, with ice cooling, stirred into 72 ml of concentrated ammonia solution (33% in water). The reaction mixture was stirred at room temperature for 3 days and then concentrated on a rotary evaporator. The residue was stirred with water and ethyl acetate and the aqueous phase was extracted twice with ethyl acetate. The combined organic phases were washed with saturated aqueous sodium chloride solution and then dried over sodium sulphate, filtered and concentrated on a rotary evaporator. The residue was purified by preparative HPLC (acetonitrile/water/water+1% TFA—40:55:5). This gave 134 mg of the title compound (19% of theory).

Provenance & Evidence