反应详情

(3S,4S)-benzyl 3-((R)-3-((S)-1-(3-chloro-2-fluorophenyl)-1-hydroxy-5-methoxypentyl)piperidine-1-carboxamido)-4-cyclohexylpiperidine-1-carboxylate (18.4 mg, 0.027 mmol) and palladium(II) chloride (catalytic amount, c.a. 4 mg) were mixed with EtOAc (3 mL). The flask was evacuated and filled by H2 gas (3×). A balloon filled with H2 gas was attached to the flask to maintain the H2 gas atmosphere for 2 h. LC-MS showed most of the starting material had been converted to product. The mixture was concentrated, redissolved in acetonitrile (3 mL), filtered and purified by preparative HPLC to afford (3R)-3-((S)-1-(3-chloro-2-fluorophenyl)-1-hydroxy-5-methoxypentyl)-N-((3RS,4RS)-4-cyclohexylpiperidin-3-yl)piperidine-1-carboxamide (16.6 mg, quant). LC-MS (3 min) tR=1.58 min., m/z 538 (M+1).

1. customThe flask was evacuated
2. additionfilled by H2 gas (3×)
3. additionA balloon filled with H2 gas
4. temperatureto maintain the H2 gas atmosphere for 2 h
5. concentrationThe mixture was concentrated
6. dissolutionredissolved in acetonitrile (3 mL)
7. filtrationfiltered
8. custompurified by preparative HPLC