Pyridine → HCID 70372059, compound

Participants

Reaction Steps

cis-hydrogenation using Lindlar catalyst and pyridine: Stir a mixture of 533 mg, 2.51 mmoles of the title compound of Example 1 (recrystallized from dichloromethane-hexane), 211 mg, 2.67 mmoles of pyridine and 127 mg of Lindlar catalyst (palladium on calcium carbonate, poisoned with lead (obtained from Aldrich) in 25 mL of ethyl acetate under hydrogen at atomospheric pressure at 26° C. for 1 hr until the theoretical amount of hydrogen (62 mL) is consumed. Remove the catalyst by filtration and wash it with ethyl acetate. Wash the ethyl acetate solution successively with ice-cold 4% HCl solution, saturated NaHCO3 solution and water, and dry over anhydrous MgSO4. Evaporate solvent under vacuum to give the title compound as an oil (534 mg).

Provenance & Evidence