	US 12,304,973 B2
	Polysaccharide derivative production method and lignin derivative production method
Daisuke Hirose, Kanazawa (JP); Samuel Budi Wardhana Kusuma, Kanazawa (JP); Chie Maruyama, Kanazawa (JP); Naoki Wada, Kanazawa (JP); and Kenji Takahashi, Kanazawa (JP)
Assigned to NATIONAL UNIVERSITY CORPORATION KANAZAWA UNIVERSITY, Kanazawa (JP)
Appl. No. 17/430,162
Filed by NATIONAL UNIVERSITY CORPORATION KANAZAWA UNIVERSITY, Kanazawa (JP)
PCT Filed Mar. 5, 2020, PCT No. PCT/JP2020/009465 § 371(c)(1), (2) Date Aug. 11, 2021, PCT Pub. No. WO2020/184384, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 2019-043063 (JP), filed on Mar. 8, 2019.
Prior Publication US 2022/0153877 A1, May 19, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C08B 3/10 (2006.01)

CPC C08B 3/10 (2013.01)

4 Claims

1. A method for producing a polysaccharide derivative comprising:

dissolving a raw material comprising a polysaccharide in an ionic liquid having an anion which is a non-carboxylate anion, wherein a conjugate acid of the non-carboxylate anion has a pKa of 4 or higher in vacuum, and reacting the raw material with an acyl group donor,

wherein the anion is selected from the group consisting of a substituted or unsubstituted phenolate, a substituted or unsubstituted pyridinolate, a substituted or unsubstituted pyrimidinolate, a substituted or unsubstituted 2,6-dioxo-1,2,3,6-tetrahydropurin-7-ide, and a substituted or unsubstituted imidazol-1-ide.