反应详情

Lithium hydroxide monohydrate (0.2 g) was added to a solution of ethyl 2-propylthiazole-4-carboxylate (example 56, step b) (0.24 g) in a mixture of THF (4 mL) and water (1 mL). The resulting suspension was stirred overnight at RT. The reaction was acidified with aqueous HCl solution (2M, 3 mL) and evaporated. The residue was partitioned between brine (5 mL) and ethyl acetate (20 mL). The layers were separated and the aqueous phase extracted with ethyl acetate (2×20 mL). The combined organic solutions were dried over sodium sulphate, filtered and evaporated to give the subtitled compound as a white solid. Yield 0.17 g.

1. customevaporated
2. customThe residue was partitioned between brine (5 mL) and ethyl acetate (20 mL)
3. customThe layers were separated
4. extractionthe aqueous phase extracted with ethyl acetate (2×20 mL)
5. dry with materialThe combined organic solutions were dried over sodium sulphate
6. filtrationfiltered
7. customevaporated