反应详情

To a solution of isopropylamine (1.31 g, 22.19 mmol) in methanol (25 mL) is added portionwise phenylisothiocyanate (3.0 g, 22.19 mmol). The solution which becomes slightly warm during the addition is stirred at rt for 4 h before pyridine (2.63 g, 33.29 mmol) and methyl bromoacetate (3.39 g, 22.19 mmol) is added. The mixture is stirred for another 16 h at rt before it is poured onto 1 N aq. HCl (100 mL) and extracted with diethyl ether (150 mL). The aq. layer is neutralised by adding sat. aq. NaHCO3 and extracted with diethyl ether (4×150 mL). The organic extracts are dried over MgSO4 and evaporated. The remaining solid is suspended in diethyl ether/heptane, filtered off, washed with additional diethyl ether/heptane and dried to give 3-phenyl-2-[(Z)-isopropylimino]-thiazolidin-4-one.

1. temperatureThe solution which becomes slightly warm during the addition
2. additionis added
3. extractionextracted with diethyl ether (150 mL)
4. additionby adding sat. aq. NaHCO3
5. extractionextracted with diethyl ether (4×150 mL)
6. dry with materialThe organic extracts are dried over MgSO4
7. customevaporated
8. filtrationfiltered off
9. washwashed with additional diethyl ether/heptane
10. customdried