Methyl iodide → (R)-2-(4-methoxy-3,5-dimethyl-phenyl)-1-methoxycarbonyl-ethyl 4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidine-1-carboxylate

Participants

Reaction Steps

19 μL (0.30 mmol) iodomethane were added to a solution of 100 mg (0.20 mmol) (R)-2-(4-hydroxy-3,5-dimethyl-phenyl)-1-methoxycarbonyl-ethyl 4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidine-1-carboxylate in 2 mL DMF and the mixture was stirred for 15 min at RT. Then 131 mg (0.40 mmol) Cs2CO3 was added and the reaction solution was heated to 50° C. for 3 h. The precipitate was filtered, the filtrate was evaporated down to 1 mL down and combined with 3 mL water. The precipitate was suction filtered, dried and further reacted without purification.

Provenance & Evidence