Sodium Hydroxide → HCID 69156675, compound

Participants

Reaction Steps

4-[4-Chloro-2-(2-ethoxycarbonyl-ethyl)-phenylamino]-piperidine-1-carboxylic acid tert-butyl ester (5.7 g, 13.9 mmol) was set stirring in MeOH (40 mL). A solution of NaOH (1.4 g, 34.7 mmol) in water (10 mL) was added and the mixture stirred at room temperature. After 3 h the mixture was acidified to pH 7 and MeOH was evaporated. The aqueous layer was extracted with CH2Cl2 (3×100 mL). The organics were combined, dried over Na2SO4 and concentrated to afford 3.9 g (73%) of the desired product. TLC (silica, 50% EtOAc/hexanes): Rf=0.4. MS (electrospray): exact mass calculated for C19H27ClN2O4, 382.17; m/z found, 381.1 [M31 −H].

Provenance & Evidence