642494-37-9
642494-37-9 結構式
基本信息
吲哚-7-硼酸頻哪醇酯
1H-Indole-7-boronic acid, pinacol ester
1H-INDOL-7-YLBORONIC ACID PINACOL ESTER
REF DUPL: Indole-7-boronic acid pinacol ester
7-(tetraMethyl-1,3,2-dioxaborolan-2-yl)-1H-indole
4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3H-indole
7-(4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLAN-2-YL)-1H-INDOLE
1H-Indole, 7-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)-
3-hydroxy-2,3-dimethylbutan-2-yl hydrogen 1H-indol-7-ylboronate
7-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indole, 2-(1H-Indol-7-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
物理化學性質
制備方法
51417-51-7
73183-34-3
642494-37-9
以7-溴吲哚和聯(lián)硼酸頻那醇酯為原料合成7-吲哚硼酸頻那醇酯的一般步驟如下：將7-溴吲哚（20g，0.102mol）溶解于裝有DMSO（100mL）的1L單頸燒瓶中，依次加入雙（頻哪醇合）二硼（39g，0.153mol）、[1,1'-雙（二苯基膦基）二茂鐵]二氯鈀（Pd(dppf)Cl2，4g，0.005mol）和乙酸鉀（15g，0.153mol）。將反應體系加熱至85℃并攪拌反應2小時。反應完成后，加入水淬滅反應。用乙酸乙酯對混合物進行三次萃取，合并有機相并用無水硫酸鈉干燥。減壓濃縮后，通過柱色譜法純化，得到目標產物7-吲哚硼酸頻那醇酯（25g，0.103mol）。產物的結構通過1H NMR（400MHz，CDCl3）和質譜（ESI）確認：1H NMR (400 MHz, CDCl3) δ 9.29 (s, 1H), 7.82 (d, J = 7.9 Hz, 1H), 7.70 (d, J = 7.0 Hz, 1H), 7.32-7.29 (m, 1H), 7.21-7.14 (m, 1H), 6.62-6.57 (m, 1H), 1.44 (s, 12H); MS (ESI) m/z: [M + H]+ 244.1。
參考文獻：
[1] Synlett, 2003, # 8, p. 1204 - 1206
[2] Advanced Synthesis and Catalysis, 2017, vol. 359, # 19, p. 3421 - 3427
[3] Journal of the American Chemical Society, 2017, vol. 139, # 24, p. 8267 - 8276
[4] European Journal of Organic Chemistry, 2016, vol. 2016, # 27, p. 4621 - 4628
[5] Patent: JP2015/528445, 2015, A. Location in patent: Paragraph 0047; 0065