4-Methyl-5-(2-hydroxyethyl)thiazole → 103871-46-1
反応式
[OH:1][CH2:2][CH2:3][C:4]1[S:8][CH:7]=[N:6][C:5]=1[CH3:9].[Br:10][CH2:11][C:12]([O:14][CH2:15][CH3:16])=[O:13]>C(O)C>[Br-:10].[CH2:15]([O:14][C:12]([CH2:11][N+:6]1[C:5]([CH3:9])=[C:4]([CH2:3][CH2:2][OH:1])[S:8][CH:7]=1)=[O:13])[CH3:16]参加物
4
反応条件
- 温度
- 0 °C
実験手順
A solution of 5-(2-hydroxyethyl)-4-methylthiazole (306 g) and ethyl bromoacetate (356.2 g) in ethanol (1 L) was heated to reflux. After two hours, the ethanol was removed by distillation and the residue treated with isopropanol (1.5 L). The resulting solution was cooled to about 0° C., causing crystallization of compound 1. After three hours, the crystalline material was separated from the mother liquor. Additional crystals were obtained by prolonged cooling of the mother liquor at 0° C. Combination of the crystalline material gave 474.3 g of compound 1. Melting point 96°-98° C.