HCID 131725343, compound → HCID 58595118, compound

Participants

Reaction Steps

p-Nitrobenzyl (1R,5S,6S)-2-[1-(4-{N-isopropyl-N-[2-(p-nitrobenzyloxycarbonylamino)ethyl]-carbamoyl}-1,3-thiazol-2-yl)azetidin-3-yl]thio-6-[(R)-1-hydroxyethyl]-1-methylcarbapen-2-em-3-carboxylate (610 mg, 0.74 mmol) (obtained as described in Example 65(1)) in a mixture of tetrahydrofuran (30 ml) and distilled water (30 ml) was subjected to catalytic hydrogenation in the presence of 7.5% palladium on charcoal (610 mg) in a water bath (35° C.) for 2 hours. After checking the completion of the reaction, ethyl acetate and distilled water were added to the reaction mixture. The resulting mixture was shaken in a separatory funnel and the aqueous layer was separated and concentrated under reduced pressure. The residue was purified by chromatography on a Cosmosil column (eluant: distilled water→2% acetonitrile in distilled water→4% acetonitrile in distilled water→6% acetonitrile in distilled water→8% acetonitrile in distilled water→10% acetonitrile in distilled water→12% acetonitrile in distilled water→14% acetonitrile in distilled water→16% acetonitrile in distilled water→18% acetonitrile in distilled water) and the eluate was lyophilized to afford the desired compound (1R,5S,6S)-2-(1-{4-[N-(2-aminoethyl)-N-isopropyl-carbamoyl]-1,3-thiazol-2-yl}azetidin-3-yl)thio-6-[(R)-1-hydroxyethyl]-1-methylcarbapen-2-em-3-carboxylic acid (104 mg, yield 28%) as a white solid.

Provenance & Evidence