p-Xylyl bromide → methyl N-[[2-chloro-5-[2-[(4-methylphenyl)methyl]-2H-1,2,3-triazol-4-yl]phenyl]methyl]carbamate

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A mixture of methyl N-[[2-chloro-5-(1H-1,2,3-triazol-5-yl)phenyl]methyl]carbamate (i.e. the product of Step E, Example 9) (0.24, 0.9 mmol), 4-methylbenzyl bromide (0.17 g, 1.1 mmol) and potassium carbonate (0.25 g, 1.8 mmol) in N,N-dimethylformamide (4.5 mL) was heated at 100° C. for 24 h. The reaction mixture was allowed to cool and then partitioned between diethyl ether (50 mL) and water (30 mL). The organic layer was separated, washed with water (3×), dried over magnesium sulfate, filtered and concentrated under reduced pressure. The resulting residue was dissolved in ethyl acetate and ethanol (2:1 mixture) and concentrated onto silica gel, and then purified by flash column chromatography using 5 g of silica gel (0 to 50% gradient of ethyl acetate in hexanes as eluant) to provide methyl N-[[2-chloro-5-[2-[(4-methylphenyl)methyl]-2H-1,2,3-triazol-4-yl]phenyl]methyl]carbamate, a compound of the present invention, as a colorless oil (0.11 g)

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