反应 #217608

反应方程式

4-bromo-2-methylthiophene

N,N-diethylethanamine

4,4,5,5-tetramethyl-1,3,2-dioxaborolane

→

title compound ( D38 )

4,4,5,5-Tetramethyl-2-(5-methyl-3-thienyl)-1,3,2-dioxaborolane

溶剂

THF

反应条件

后处理

1. 1
   温度The reaction was cooled
2. 2
   过滤filtered
3. 3
   洗涤washing with tert-butyl methyl ether
4. 4
   其他the residue purified by chromatography on silica gel (gradient of hexane to 3% ethyl acetate:hexane)

实验过程

To 4-bromo-2-methylthiophene (1.5 g, 8.5 mmol) in THF (17 ml) was added bis[(1,1-dimethylethyl)phosphanyl]palladium (218 mg, 0.43 mmol), then N,N-diethylethanamine (2.5 g, 25.4 mmol) and 4,4,5,5-tetramethyl-1,3,2-dioxaborolane (1.63 g, 12.7 mmol) and the resulting mixture heated at 40° C. under argon for 2 hours. The reaction was cooled and then filtered, washing with tert-butyl methyl ether. The washings were reduced in vacuo and the residue purified by chromatography on silica gel (gradient of hexane to 3% ethyl acetate:hexane) to afford the title compound (D38). MS (ES+) m/e 225 [M+H]+.

来源