Dimethylformamide → 4,4-Difluoro-3-methyl-3-butenyl 4-methyl-2-phenylthiazole-5-carboxylate

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To 25 ml of N,N-dimethylformamide were dissolved 2.60 g (13 mmol) of 4,4-difluoro-3-methyl-3-butenyl methanesulfonate and 2.19 g (10 mmol) of 4-methyl-2-phenylthiazole-5-carboxylic acid, followed by the addition of 1.68 g (20 mmol) of sodium hydrogencarbonate and stirring at 100° C. for 3 hours. The reaction liquid was then poured in water and extracted with diethyl ether. The organic layer was washed with water and a saturated saline solution in this order, followed by drying over anhydrous magnesium sulfate and concentration under reduced pressure. The residue was purified with silica gel column chromatography (ethyl acetate ether: hexane=1:9) to obtain 3.03 g (yield: 94%) of 4,4-difluoro-3-methyl-3-butenyl 4-methyl-2-phenylthiazole-5-carboxylate.

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