Sodium Hydroxide → HCID 58935428, compound

Participants

Reaction Steps

6.43 g ethyl (2“rel1”)-2-{[1-({[(3S)-1-(2-tert. butoxy-2-oxoethyl)-2-oxo-2,3,4,5-tetrahydro-1H-1-benzazepin-3-yl]amino}carbonyl)cyclopentyl]methyl}-4-[(3-hydroxypropyl)amino]-4-oxobutyrate (for preparation see Example 5) was dissolved in 140 ml of a 1:1 (v/v) mixture of water and ethanol, and 4.28 g solid NaOH was added thereto with stirring. After 15 h, the solvent was evaporated at reduced pressure, the residue was taken up in 100 ml EA and washed once with 50 ml aqueous KHSO4 solution. The aqueous phase was extracted twice with 30 ml EA each time. The combined organic phases were washed twice with 30 ml aqueous common salt solution each time and dried over sodium sulfate. Evaporation of the solvent yielded 5.41 g of the title compound.

Provenance & Evidence