Triethylamine → (2s)-n-{(1s,3s,4s)-1-Benzyl-4-{[(2,6-dimethylphenoxy)acetyl]amino}-3-[1-(ethylthio)ethoxy]-5-phenylpentyl}-3-methyl-2-(2-oxotetrahydropyrimidin-1(2h)-yl)butanamide

Participants

Reaction Conditions

Reaction Steps

A slurry of N-chlorosuccinimide (6.5 g, 48.7 mmol) in tetrahydrofuran (50 mL) was cooled to −10° C., followed by addition of diethyl sulfide (7.0 mL) and then by addition of a solution of Example 3 (5.0 g) in tetrahydrofuran (20 mL). A solution of triethylamine (9.0 mL) in tetrahydrofuran (15 mL) was then added dropwise and the mixture was stirred at −10° C. for 1.5 h. The reaction was quenched with 10% Na2CO3 and extracted twice with ethyl acetate. The combined organic was washed with water and brine and dried over MgSO4, filtered and evaporated to give the crude product (7.5 g).

Provenance & Evidence