Trimethylsilyldiazomethane → HCID 59139878, compound

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Reaction Steps

According to Scheme 7 Step 5: To a solution of 2-(3-acetamidophenyl)-4-(4-chlorobenzyl)-3,5-dioxo-2,3,4,5-tetrahydro-1,2,4-triazine-6-carboxylic acid 11(D) (80 mg, 0.19 mmol) in MeOH (3 mL) was added dropwise at 0° C. a solution of trimethylsilyldiazomethane 2M (1.3 mL, 2.70 mmol). The mixture was stirred at room temperature for 18 h. The mixture was diluted with 100 mL of a saturated solution of NaHCO3 and the aqueous layer was extracted twice with 100 mL of DCM. The organic layers were combined, dried over MgSO4, filtered and concentrated under reduced pressure to afford a yellow solid. The crude solid was purified by flash chromatography with silica gel (AIT Flashmart prepacked column 7 g SiO2) using CH2Cl2/MeOH 98/2 as eluant to afford a yellow solid. The solid was further triturated with diisopropylether and filtered to afford methyl 4-(4-chlorobenzyl)-2-(3-acetamidophenyl)-3,5-dioxo-2,3,4,5-tetrahydro-1,2,4-triazine-6-carboxylate (35 mg, 42%) as a beige solid.

Provenance & Evidence