Acetic Acid → 9-Methyl-5-nitroso-2,3,4,5-tetrahydro-1,5-benzothiazepine

Participants

Reaction Conditions

Reaction Steps

To a solution of 9-methyl-2,3,4,5-tetrahydro-1,5-benzothiazepine (500 mg, 2.6 mmol) and AcOH (2 mL) cooled to ˜9° C. was added a solution of NaNO2 (212 mg, 3.1 mmol) and water (1 mL) dropwise over 4 min (internal temperature<12° C.). The cooling bath was removed and the reaction was maintained at 23° C. for 2 h. It was diluted with H2O (50 mL). 9-methyl-5-nitroso-2,3,4,5-tetrahydro-1,5-benzothiazepine was obtained (470 mg, 87%) as a yellow solid after it was collected by vacuum filtration and air-dried at 23° C.

Provenance & Evidence