Trifluoroacetic acid → HCID 131715529, compound

Participants

Reaction Steps

At 0° C., 2.39 g (3.9 mmol) of (3S)-[1-[(1,4-dihydro-5-hydroxy-4-oxo-2-pyridinyl)carbonyl]-2-[[[[2-oxo-3-[[(phenylmethoxy)carbonyl]amino]-1-azetidinyl]carbonyl]amino]sulfonyl]hydrazino]acetic acid, 1,1-dimethylethyl ester was added to a mixture of 7.0 ml of trifluoroacetic acid and 1.66 ml of thioanisole. After stirring overnight at room temperature, the solution was evaporated in vacuo. The residue was successively washed (stirred) with ethyl acetate, ethyl acetate/petroleum ether (1:1), petroleum ether and dichloromethane and then dried in vacuo. This crude salt was used in the next step without any further purification. Yield: 2.15 g.

Provenance & Evidence