反应详情

Methyl 2-aminothiazole-4-carboxylate (1.0, 6.32 mmol), 3-hydroxy-2-butanone (1.045 ml, 12.01 mmol) and acetic acid (2.278 g, 37.9 mmol) were dissolved in 1,2-dichloroethane. Sodium triacetoxy borohydride (3.75 g, 17.70 mmol) was added and the reaction mixture was stirred overnight. Sodium triacetoxy borohydride (3.1 g) was added in two portions and the reaction mixture was stirred over two nights. 1M NaHCO3 was added slowly and mixture was extracted twice with DCM. DCM phase was dried and evaporated to afford 68.1% of the title product. m/z [230.3+1].

1. stirringthe reaction mixture was stirred over two nights
2. extractionmixture was extracted twice with DCM
3. dry with materialDCM phase was dried
4. customevaporated