Acetylglycine → (E)-2'-(2-acetamidoacetyl)-2(R)-[1(S)-[(tetrahydro-2(RS)-pyranyloxy)carbamoyl]-4-phenyl-3-butenyl]-2'-isobutyl-4-methylvalerohydrazide

Participants

Reaction Steps

A solution of 0.459 g of (E)-2(R)-[1(S)-[(tetrahydro-2(RS)-pyranyloxy)carbamoyl]-4-phenyl-3-butenyl]-2′-isobutyl-4-methylvalerohydrazide in 4 ml of dimethylformamide was cooled to 0° C. and treated with 0.351 g of N-acetyl-glycine and 690 mg of 1-ethyl-3-(3-dimethylaminopropyl)carbodimide hydrochloride. The mixture was stirred at room temperature for 16 hours and evaporated. The residue in ethyl acetate was washed with 5% sodium hydrogen carbonate solution and water, dried over anhydrous magnesium sulphate and evaporated. The resulting solid was triturated with diethyl ether and filtered off to give 0.436 g of (E)-2′-(2-acetamidoacetyl)-2(R)-[1(S)-[(tetrahydro-2(RS)-pyranyloxy)carbamoyl]-4-phenyl-3-butenyl]-2′-isobutyl-4-methylvalerohydrazide in the form of a white solid.

Provenance & Evidence