反应详情

A suspension of alumiumchloride (0.86 g, 6.44 mmol) in DCM (50 mL) was treated dropwise with morpholine (4.7 mL, 53.7 mmol) giving a colorless solution. Methyl (2-amino-5-methyl-1,3-thiazol-4-yl)acetate (1.0 g, 5.37 mmol) was added (orange solution) and after 1 h, the reaction mixture was quenched with aqueous citric acid (3%, 10 mL) and basified with saturated aqueous sodium bicarbonate. Extraction with DCM (3×50 mL), drying (sodium sulfate) of the combined organic layers and evaporation of the volatiles gave 0.70 g of a yellow foam. Purification of the solid by flash column chromatography on silicagel eluting with DCM/methanol (10/1 v/v) gave 545 mg (42%) of an ivory solid: Anal. Calcd. (found) for C10H15N3O2S: C, 49.7 (49.5)%; H, 6.3 (6.3)%; N, 17.4 (17.3)%; S, 13.3 (13.3).

1. customgiving a colorless solution
2. customthe reaction mixture was quenched with aqueous citric acid (3%, 10 mL)
3. extractionExtraction with DCM (3×50 mL)
4. customdrying
5. custom(sodium sulfate) of the combined organic layers and evaporation of the volatiles