	US 11,891,408 B2
	Application of lithium 4-methoxyaniline in catalysis of hydroboration reaction of imine and borane
Mingqiang Xue, Suzhou (CN); and Dandan Yan, Suzhou (CN)
Assigned to SOOCHOW UNIVERSITY, Suzhou (CN)
Filed by SOOCHOW UNIVERSITY, Suzhou (CN)
Filed on Apr. 7, 2021, as Appl. No. 17/224,378.
Application 17/224,378 is a continuation of application No. PCT/CN2018/109374, filed on Oct. 8, 2018.
Prior Publication US 2021/0221828 A1, Jul. 22, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C07F 5/04 (2006.01); B01J 31/12 (2006.01)

CPC C07F 5/04 (2013.01) [B01J 31/12 (2013.01)]

6 Claims

1. A method of preparing a borate ester comprising:

reacting an imine with a borane in an organic solvent and in the presence of 4-methoxyaniline lithium as a catalyst at room temperature under anhydrous, oxygen-free, and inert gas conditions for 1-2 hours; and

stirring in air to stop reaction and to obtain the borate ester.