HCID 178471577, compound → HCID 178471578, compound

Participants

Reaction Steps

To 3.75 g. (5.43 mmol) of the product of Example 3, diethyl N-[N-(2-pivaloylamino-4-hydroxypyrido[2,3-d]pyrimidin-6-ylmethyl)-N-trifluoroacetyl-4-aminomethylbenzoyl]-glutamate, in 60 mL of glacial acetic acid are added 575 mg of platinum oxide. The suspension was hydrogenated in a Parr apparatus at 50 psi at 25° C. for 3 h. The reaction mixture was filtered through Celite and the solvent removed under reduced pressure. The residue was taken up in methylene chloride and extracted twice with a saturated solution of sodium bicarbonate and the organic layers dried over anhydrous magnesium sulfate and evaporated under reduced pressure. The residue was chromatographed, eluting with 5% methanol in methylene chloride to give 1.25 g (33% yield) of diethyl N-[N-(2-pivaloylamino-4-hydroxy-5,6,7,8-tetrahydropyrido[2,3-d]pyrimidin-6-ylmethyl)-N-trifluoroacetyl-4-aminomethylbenzoyl)-glutamate; 1H NMR (Me2SO d6) delta 1.11-1.15 (m, 6H), 1.33 (s, 9H), 1.6-2.1 (m, 6H), 2.28-2.33 (m, 2H), 3.07-3.18 (m, 1H), 3.97-4.10 (m, 4H), 4.10-4.20 (m, 1H), 6.64-6.67 (m, 1H), 8.03-8.06, (m, 1H).

Provenance & Evidence