2-Methylbenzenesulfonic acid hydrate → HCID 86626187, compound

Participants

Reaction Steps

A solution of toluenesulfonic acid monohydrate (10 mg, 0.053 mmol) in absolute ethanol (1 mL) was added to a solution of 2-(trimethylsilyl)ethyl (S)-3-cyclohexyl-2-((tert-butyl-carbamoyl)methylamino)propylcarbamate (21.3 mg, 0.51 mmol) in Et2O (10 mL). This solution was placed in a flask on a rotary evaporator and the Et2O was removed at ambient temp. The flask was then lowered into a water bath (60° C.) and selective removal of the Boc group proceeded concurrently with removal of the solvent. The reaction was complete within 2 h. This material was taken up in CH2Cl2 (20 mL) and 1N aq NaOH (10 mL) and extracted with CH2Cl2 (2×10 mL). The combined organic layers were washed with brine (2×5 mL), dried over Na2SO4, decanted, and stripped to afford 2-(trimethylsilyl)ethyl (S)-3-cyclohexyl-2-(methylamino)propylcarbamate (15.0 mg, 94%) as a clear film. MS ESI+ve m/z 315 (M+1).

Provenance & Evidence