N-Methylpiperidine → HCID 178502741, compound

Participants

Reaction Steps

To an ice cold solution of 1.74 g of cis-3-tert-butoxycarbonylmethyl-cyclobutanecarboxylic acid, 3 mL of N-methyl-piperidine, and 50 mL of dichloromethane was added 1.7 mL of isobutyl chloroformate drop-wise over 5 min. After an additional 5 min, 1.6 g of N-methyl-N-methoxy-amine hydrochloride was added and the mixture allowed to warm with stirring overnight. The resulting mixture was diluted with 100 mL of dichloromethane, washed with 100 mL of water, 100 mL of 0.1 N HCl, 50 mL of saturated sodium carbonate and dried over magnesium sulfate. The solution was diluted with 50 mL of toluene and concentrated under reduced pressure. Drying under vacuum overnight gave 2.08 g of product as a colorless thick oil: MS (m+1)=258.3; 1H NMR (400 MHz, CDCl3) 3.62 (s, 3H), 3.16 (s, 3H), 2.35 (d, 2H), 2.0 (dd, 1H), 1.4 (s, 9H).

Provenance & Evidence