1,2-Dichloroethane → 1-Methylpiperidine-4-carboxylic acid

Participants

Reaction Steps

A solution of 1-methyl-piperidin-4-yl carboxylic acid (0.050 g, 0.30 mmol, 1.0 equiv) and EDC (0.057 g, 0.30 mmol, 1.0 equiv) was prepared in 15 mL of DMF. After 15 min morpholine-4-carboxylic acid [1-(4-cyano-piperidin-4-ylcarbamoyl)-2-cyclohexyl-ethyl]-amide hydrochloride (0.128 g, 0.30 mmol, 1.0 equiv) was added followed by N-methyl-morpholine (0.12 g, 1.2 mmol, 4.0 equiv) followed by stirring overnight (16 h). The reaction mixture was diluted with 100 mL of saturated sodium bicarbonate solution and the product was extracted with 2×50 mL of EtOAc. The combined organic extracts were concentrated. The crude product was purified by semi-prep reverse-phase HPLC using 20 to 80% CH3CN in water over a gradient of 25 min to yield the desired product as a white solid (39 mg); MS, m/z 517=M+1.

Provenance & Evidence