反应详情

11.3 g of (4R)-2-(2-hydroxyphenyl)-4-thiazolidinecarboxylic acid and 13.2 g of triethylamine are dissolved in 200 ml of dehydrated acetone and 11.7 g of S-benzoyl-3-mercaptopropanoyl chloride is added dropwise while stirring under ice-cooling. After the addition, the mixture is stirred under ice-cooling for 1 hour. 4 N Hydrochloric acid in ether is added to this mixture and the precipitate is filtered. The filtrate is concentrated in vacuo and the obtained oil is dissolved in ethyl acetate, washed with 2 N hydrochloric acid and saturated sodium chloride solution, dried over anhydrous sodium sulfate, and concentrated to dryness in vacuo to give the titled compound, yield 12 g (58%), mp. 100.5°-101° C. (dec.) (ethyl acetatebenzene), [α]D26 +130.8° (c=1.0, methanol).

1. temperaturecooling
2. additionAfter the addition
3. stirringthe mixture is stirred under ice-
4. temperaturecooling for 1 hour
5. filtrationthe precipitate is filtered
6. concentrationThe filtrate is concentrated in vacuo
7. dissolutionthe obtained oil is dissolved in ethyl acetate
8. washwashed with 2 N hydrochloric acid and saturated sodium chloride solution
9. dry with materialdried over anhydrous sodium sulfate
10. concentrationconcentrated to dryness in vacuo