Hydrochloric Acid → tert-butyl(S)-6-tert-butoxycarbonylamino-2-(2-oxooxazolidine-3-sulfonylamino)hexanoate

Participants

Reaction Steps

A suspension of 5.39 g of H-Lys(Boc)-OtBu hydrochloride (15.9 mmol, 1.0 eq) and 7.1 ml of triethylamine (50.9 mmol, 3.2 eq) in dichloromethane (70 ml) was added to the solution obtained in Example 143d), in such a way that the temperatures did not exceed 10° C. After the addition was complete, the mixture was allowed to reach RT and was stirred for a further 2 h. The reaction mixture was then mixed with 200 ml of 0.2 M hydrochloride acid, and the organic phase was separated off and washed with 100 ml of 0.2 M hydrochloric acid and concentrated. 5.5 g of the desired material were obtained as a colorless oil, which crystallized on standing.

Provenance & Evidence