Benzoic Acid → (+)-5-[[(2R, 4S)-4-benzoyloxy-1-(4-methoxyphenethyl)pyrrolidin-2-yl]methyl]-5,11-dihydrodibenzo[b,e][1,4]oxazepine

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Reaction Steps

Mixture of 660 mg (1.53 mmol) of (+)-5,11-dihydro-5-[[(2R,4R)-4-hydroxy-1-(4-methoxyphenethyl)pyrrolidin-2-yl]methyl]dibenzo[b,e][1,4]oxazepine, 1.04 g (3.98 mmol), 486 mg (3.98mmol) of benzoic acid, and 693 mg (3.98 mmol) of DEAD in tetrahydofuran (15 ml) was stirred for 20 hours at room temperature. The mixture was diluted with ether and the solution was washed with saturated aqueous sodium hydrogen carbonate, water, and saturated aqueous sodium chloride, dried over anhydrous sodium sulfate, and concentrated in vacuo. The residue was purified by silicagel column chromatography (ethyl acetate:n-hexane=1:1) to give 680 mg (83.3%) of (+)-5-[[(2R,4S)-4-benzoyloxy-1-(4-methoxyphenethyl)pyrrolidin-2-yl]methyl]-5,11-dihydrodibenzo[b,e][1,4]oxazepine as pale yellow amorphous.

Provenance & Evidence