Triethylamine → 4-[1-[(Methylsulfonyl)oxy]ethyl]-1-piperidinecarboxylic acid 1,1-dimethylethyl ester

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Reaction Steps

(±)-1,1-Dimethylethyl 4-{1-[(methylsulfonyl)oxy]ethyl}-1-piperidinecarboxylate (0.74 g, 49%) was prepared as a light brown oil from (±)-1,1-dimethylethyl 4-(1-hydroxyethyl)-1-piperidinecarboxylate (0.56 g, 2.44 mmol), methanesulfonyl chloride (0.23 mL, 2.93 mmol) and Et3N (0.69 mL, 4.88 mmol) in a manner similar to Example 150, Step 1. The crude product was used without further purification. 1H NMR (400 MHz, CDCl3): δ 4.70-4.55 (m, 1H), 4.20-4.10 (m, 2H), 2.99 (s, 3H), 2.70-2.55 (m, 2H), 1.80-1.60 (m, 3H), 1.43 (s, 9H), 1.38 (d, 3H, J=6.4 Hz), 1.35-1.15 (m, 2H).

Provenance & Evidence