Triethylamine → N-[2-(3-butoxy-3-o-tolyl-azetidin-1-yl)-1-(2-hydroxy-4-methoxybenzyl)-2-oxoethyl]-3-(3H-imidazol-4-yl)propionamide trifluoro-acetate

Participants

Reaction Steps

0.25 ml (0.6 mmol) of triethylamine is added to a solution of 90 mg (0.6 mmol) of desamino-histidine and 207 mg (0.6 mmol) of TBTU in 2 ml of dimethylformamide. After stirring for 1 h at ambient temperature, 250 mg (0.4 mmol) of 2-amino-1-(3-butoxy-3-o-tolylazetidin-1-yl)-3-(3-hydroxy-4-methoxyphenyl)propan-1-one trifluoroacetate are added and the mixture is stirred for 72 h at ambient temperature. 10 ml of a saturated aqueous solution of sodium hydrogen carbonate are then poured into the reaction medium, which is extracted with a 20/80 heptane/ethyl acetate mixture. The organic phase is dried over magnesium sulphate, filtered and concentrated. The product is purified by preparative thin layer chromatography (eluent: 90/10 dichloro-methane/methanol). 30 mg of N-[2-(3-butoxy-3-o-tolyl-azetidin-1-yl)-1-(2-hydroxy-4-methoxybenzyl)-2-oxoethyl]-3-(3H-imidazol-4-yl)propionamide trifluoro-acetate are obtained in the form of a beige powder with a yield of 11%.

Provenance & Evidence