反应详情

温度

15 °C

To 114.5 g of 5-[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]-2-thioxo-4-thiazolidinone, 815 ml of 2M sodium hydroxide was added. The resultant mixture was heated to reflux temperature over the course of one hour and maintained at reflux for 2 hours. The mixture was cooled in an ice/water bath to 15° C. and 290 ml of 6M hydrochloric acid was added dropwise under a nitrogen atmosphere over 15 minutes, keeping the temperature of the mixture below 16° C. The resultant solid was dissolved by adding 600 ml of ethyl acetate to the mixture. The organic layer was separated, washed 3 times with 100 ml of saturated sodium chloride solution, dried over sodium sulfate and then the solvent was removed in vacuo to yield 100.3 g (100% of yield) of the subtitled intermediate. mp 137°-140° C.

1. temperatureto reflux temperature over the course of one hour
2. temperaturemaintained
3. temperatureat reflux for 2 hours
4. customthe temperature of the mixture below 16° C
5. dissolutionThe resultant solid was dissolved
6. customThe organic layer was separated
7. washwashed 3 times with 100 ml of saturated sodium chloride solution
8. dry with materialdried over sodium sulfate
9. customthe solvent was removed in vacuo
10. customto yield