Trimethyl orthoformate → 7-tert-Butyl-3-[2-methyl-3-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-3H-quinazolin-4-one

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Reaktionsschritte

A solution of 2-Amino-4-tert-butyl-benzoic acid (78 mg, 0.41 mmol) in 2 mL trimethylorthoformate was heated to 105° C. for 30 minutes. The resulting solution was concentrated in vacuo. 2-Methyl-3-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenylamine (100 mg, 0.41 mmol) in 2 mL toluene was added. The resulting mixture was heated at reflux for 1 hour, concentrated in vacuo, and purified by flash chromatography (15% ethylacetate/hexanes) to yield 7-tert-Butyl-3-[2-methyl-3-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-3H-quinazolin-4-one (68 mg, 0.16 mmol). MS (ESI) 419.2 (M+H)+.

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