3,5-Difluoromandelic acid → 3-[N'-(3,5-Difluorophenyl-a-hydroxyacetyl)-L-alaninyl]amino-2,4-dioxo-1,5-bis-methyl-2,3,4,5-tetrahydro-1H-1,5-benzodiazepine

Participants

Reaction Steps

Following General Procedure I above using 3,5-difluoromandelic acid (Lancaster) and the product from Example 8-R, the title compound was prepared as an amorphous white solid. Purification was by L.C. 2000 eluting with straight EtOAc then flash chromatography eluting with CH2Cl2/Acetone (4:1 gradient to 3:1). Rf=0.39 and 0.34 (EtOAc).

Provenance & Evidence