Diisopropylethylamine → HCID 136335775, compound

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Reaction Steps

After reconversion to the base, the compound obtained in Step C of Example 1 (2.14 mmol) is dissolved in 30 ml of dimethylformamide. There are added 0.75 ml (4.28 mmol) of diisopropylethylamine and 314 mg (2.35 mmol) of 5-(chloromethyl)-2,4-dihydro-3H-1,2,4-triazol-3-one prepared according to the method described in Tetrahedron Letters,2000, 41, 8661. The mixture is stirred for 12 hours at ambient temperature and then evaporated to dryness. The residue obtained is taken up in dichloromethane, washed, dried, filtered and evaporated. The oil obtained is purified by flash chromatography on silica to yield the expected product.

Provenance & Evidence