1,2-Pyrrolidinedicarboxylic acid, 1-(1,1-dimethylethyl) ester, (2S)- → HCID 131731249, compound

Participants

Reaction Steps

201 mg (1.05 mmol) of EDCl was added to 5 ml of THF solution of 100 mg (0.526 mmol) of Boc-Pro-OH (manufactured by Tokyo Chemical Industry Co., Ltd), and 113 mg (0.526 mmol) of H-D-Pro-NHPh (manufactured by Tokyo Chemical Industry Co., Ltd), followed by stirring for 6 hours at room temperature. After a reaction mixture was concentrated under reduced pressure, the concentrate was extracted by adding water and ethyl acetate. After an organic layer was washed sequentially with a diluted hydrochloric acid, an aqueous solution of sodium hydrogen carbonate and water (one time for each), it was concentrated under reduced pressure, thereby obtaining crude amide. The obtained amide compound was purified by a silica gel column chromatography (hexane/ethyl acetate=5/1 to 1/1 (volume ratio)), thereby obtaining 160 mg of the product with a yield of 73.6%.

Provenance & Evidence