HCID 70026141, compound → 4-Piperidinol,3-methyl-,acetate(ester),(3R,4R)-(9CI)

Participants

Reaction Steps

A mixture of trans-1-benzyl-4-(RS)-acetoxy-3-(RS)-methylpiperidine [7 g, 28.5 mmole {prepared according to literature procedure described in A. F. Casy and W. K. Jeffery, Can.J.Chem., 50 (1972), 803}] and 20% palladium hydroxide (1.8 g) in methanol (25 ml) was stirred at 50-55° C. under hydrogen (1 atmosphere) for 20 hr. The catalyst was filtered off and washed with methanol. Filtrate was concentrated to give trans-4-(RS)-acetoxy-3-(RS)-methyl piperidine as oil. Yield 4.41 g (100%), C8H15NO2, m/z 158 (M+1), PMR (CDCl3): 0.94 (3H, d, CH3, j=8 Hz), 1.42 (1H, m, H3), 1.67 (1H, m, H5), 1.98 (1H, m, H5), 2.08 (3H, s, COCH3), 2.3 (1H, t, H2, j=12 Hz), 2.68 (1H, dt, H2, j=3 Hz, 12 Hz), 3.04 (2H, in, H6), 4.5 (1H, dt, H4, j=3 Hz, 12 Hz).

Provenance & Evidence