365564-10-9

基本信息
3,4-二甲氧基苯硼酸频哪醇酯
3,4-二甲氧基苯硼酸频哪醇酯 1G
2-(3,4-二甲氧基苯基)-4,4,5,5-四甲基-1,3,2-二氧杂环戊硼烷
2-(3,4-Dimethoxyphenyl)-4,4,5,5-tetramethyl-
3,4-DIMETHOXYPHENYLBORONIC ACID, PINACOL ESTER
3,4-Dimethoxybenzeneboronic acid, pinacol ester
3,4-Dimethoxybenzeneboronic acid, pinacol ester 97%
3,4-DIMETHOXYPHENYLBORONIC ACID, PINACOL ESTER-YL) METHANAMINE
2-(3,4-DIMETHOXYPHENYL)-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE
1,3,2-Dioxaborolane, 2-(3,4-dimethoxyphenyl)-4,4,5,5-tetramethyl-
2-(3,4-DIMETHOXYLOXYPHENYL)-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE
1,2-Dimethoxy-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzene
物理化学性质
制备方法

91-16-7

73183-34-3

365564-10-9
以1,2-二甲氧基苯(69.9 mg, 0.506 mmol, 1.0当量)和双(频哪醇合)二硼(124 mg, 0.486 mmol, 0.96当量)为原料,在2,2'-联吡啶(1.7 mg, 11 μmol, 2.2 mol%)和[IrCl(cod)]2(2.3 mg, 3.4 μmol, 0.68 mol%)的催化下,于庚烷(2.5 mL)中95℃搅拌反应24小时。反应完成后,冷却至室温,减压浓缩反应混合物,直接用于下一步反应。随后,将S-(4-甲苯基)-4-甲苯硫代磺酸盐(2a)(69.1 mg, 0.248 mmol, 1.0当量)、硫酸铜(2.0 mg, 13 μmol, 5.0 mol%)、氟化铯(80.6 mg, 0.530 mmol, 2.1当量)和TMEDA(1.9 mg, 0.16 μmol, 6.6 mol%)加入上述粗产物中,溶于甲醇(2.5 mL),50℃搅拌24小时。反应完成后,冷却至室温,通过硅藻土垫过滤,减压浓缩滤液。残余物用乙酸乙酯(20 mL)溶解,依次用饱和碳酸氢钠水溶液(20 mL×2)和盐水(20 mL)洗涤,无水硫酸钠干燥。过滤后,减压浓缩滤液,通过制备型TLC(正己烷/乙酸乙酯=10/1)纯化,得到3,4-二甲氧基苯基4-甲苯基硫醚(3t)(39.7 mg, 61.4%),为浅黄色油状物。
参考文献:
[1] Patent: WO2013/175415, 2013, A1. Location in patent: Page/Page column 46
[2] Journal of the American Chemical Society, 2015, vol. 137, # 7, p. 2665 - 2673
[3] Journal of the American Chemical Society, 2014, vol. 136, # 18, p. 6566 - 6569
[4] Journal of the American Chemical Society, 2002, vol. 124, # 3, p. 390 - 391
[5] Journal of the American Chemical Society, 2015, vol. 137, # 15, p. 5193 - 5198