Triphenylphosphine → HCID 66701209, compound

Participants

Reaction Steps

To a solution of 0.95 g of 2-[(4-chloro-1-hydroxy-naphthalene-2-carbonyl)-amino]-2-methyl-butyric acid ethyl ester, 0.76 g 4-hydroxymethyl-piperidine-1-carboxylic acid tert-butyl ester and 1.43 g triphenylphosphine in 30 mL of dry THF, 1.10 g of diisopropylazodicarboxylate were added. After 18 h at room temperature 1.43 g of triphenylphosphine and 1.10 g of diisopropylazodicarboxylate were added, and after 3 h again 1.43 g of triphenylphosphine and 1.10 g of diisopropylazodicarboxylate were added. After an additional 24 h the reaction was concentrated. After chromatography on silica (ethyl acetate/heptane) 1.17 g of 4-[4-chloro-2-(1-ethoxycarbonyl-1-methyl-propylcarbamoyl)-naphthalen-1-yloxymethyl]-piperidine-1-carboxylic acid tert-butyl ester was obtained.

Provenance & Evidence