US 11,655,204 B2
Promotor and method for preparing the same
Yi-Kang Lan, Taoyuan (TW); Chi-Wi Ong, Taoyuan (TW); and Yong-Yun Zhang, Taoyuan (TW)
Assigned to NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY, Taoyuan (TW)
Filed by NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY, Taoyuan (TW)
Filed on Feb. 21, 2021, as Appl. No. 17/180,848.
Prior Publication US 2022/0267250 A1, Aug. 25, 2022
Int. Cl. C07C 211/46 (2006.01); C07C 211/52 (2006.01); C08F 4/34 (2006.01); C07C 209/68 (2006.01)
CPC C07C 211/46 (2013.01) [C07C 209/68 (2013.01); C07C 211/52 (2013.01); C08F 4/34 (2013.01); C07C 2601/16 (2017.05)] 1 Claim
OG exemplary drawing
 
1. A method for preparing a promotor, wherein the promotor comprises an aniline derivative having the following structure:

OG Complex Work Unit Chemistry
and the method comprises the following steps:
(a) pouring bromofluorobenzene and isopropylamine into a bottle and slowly adding potassium tert-butoxide to form a mixture;
(b) heating the mixture obtained in step (a) to reflux, and then filtering the mixture to remove potassium tert-butoxide after cooling to room temperature to obtain a first liquid;
(c) removing isopropylamine and tert-butanol from the first liquid obtained in step (b) by distillation under reduced pressure to form a second liquid; and
(d) obtaining an organic phase from the second liquid obtained in step (c) by stratification, adding water into the organic phase for extraction and washing until the organic phase is not turbid, drying the organic phase with anhydrous magnesium sulfate and then filtering, removing excess solvent by concentration under reduced pressure, and finally removing excess reactant bromofluorobenzene from the concentrated organic phase by vacuum distillation to obtain the promotor.