反应详情

Dimethyl 2-oxo-4-phenylbutylphosphonate (1 molar equivalent) is added dropwise over a 1/2 hour period to a stirred suspension of sodium hydride (2equivalents) in 1,2-dimethoxyethane maintained at or below 20° C. To the resulting reaction mixture is slowly added 7-(2-formyl-4-oxo-3-thiazolidinyl)heptanoic acid (1 molar equivalent) with good stirring and cooling (sufficient to maintain a reaction temperature at or below 20° C.). Upon completing this addition, the reaction is stirred at ambient temperature for 1 hour, then heated at reflux for 1/2 hour, cooled to room temperature, and diluted with water. The aqueous mixture is acidified with dilute hydrochloric acid and extracted with ether. The organic extract is dried over sodium sulfate, filtered, and evaporated in vacuo at 40° C. leaving the title compound as an oily residue which is purified chromatographically on silica gel.

1. temperaturemaintained at or below 20° C
2. customTo the resulting reaction mixture
3. temperaturecooling (sufficient
4. temperatureto maintain a reaction temperature at or below 20° C.)
5. additionthis addition
6. stirringthe reaction is stirred at ambient temperature for 1 hour
7. temperatureheated
8. temperatureat reflux for 1/2 hour
9. extractionextracted with ether
10. extractionThe organic extract
11. dry with materialis dried over sodium sulfate
12. filtrationfiltered
13. customevaporated in vacuo at 40° C.