反应详情

A reaction vessel was charged with 100 ml of dimethylformamide, 6.11 g (50 mmol) of potassium carbonate, and 18 g (72 mmol) of o-bromobenzyl bromide. With this mixture stirred at ambient temperature under a nitrogen atmosphere, there was added 10 g (40 mmol) of 2-[(1,1-dimethylethyl)amino]-4-trifluoromethyl-5-oxazolecarboxylic acid (prepared by Example 26). The reaction mixture was stirred at ambient temperature for 18 hours. Then, the mixture was added to water and extracted three times with ethyl ether. The ether extracts were washed with large amounts of water, then dried over magnesium sulfate, and concentrated under reduced pressure to yield 24.5 g of a gold oil. This oil was subjected to Kugelrohr distillation (65°-70° C. @ 0.4 mm Hg) to yield 9.7 g of a gold oil. The remaining still residue upon standing at ambient temperature for 30 minutes formed a solid material. Trituration of this solid material in hexane at ambient temperature resulted in 11.48 g of a white solid product (m.p.=74°-77° C.) identified in Table I.

1. stirringThe reaction mixture was stirred at ambient temperature for 18 hours
2. extractionextracted three times with ethyl ether
3. washThe ether extracts were washed with large amounts of water
4. dry with materialdried over magnesium sulfate
5. concentrationconcentrated under reduced pressure