cis-4-Hydroxy-piperidine-1,2-dicarboxylic acid 1-benzyl ester 2-methyl ester → HCID 10103419, compound

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Reaction Steps

A solution of compound 12 (7 g, 1 eq.) and Pd/C (1.4 g, 20 w %) in dry ethanol (110 mL) was stirred overnight at room temperature under hydrogen. The mixture was filtered, and the filtrate was evaporated to give compound 31 as a yellow oil in quantitative yield. 1H NMR (CDCl3, 400 MHz) δ (ppm) 1.34-1.48 (m, 2H), 1.84 (s, 2H), 1.90-1.96 (m, 1H), 2.27-2.33 (m, 1H), 2.60-2.67 (m, 1H), 3.21 (dt, J=3.86 and 12.79 Hz, 1H), 3.38 (dd, J=3.08 and 10.91 Hz, 1H), 3.70-3.78 (m, 1H), 3.75 (s, 3H).

Provenance & Evidence