1224199-09-0Relevant articles and documents
CHEMICALLY STABLE LIGNIN DERIVATIVE AND METHOD FOR PREPARING SAME
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Paragraph 0148-0150; 0165-0179, (2020/12/19)
A lignin derivative including a unit of general formula (I): in which R1, R2, R3 and R4, which may be identical or different, each represent a hydrogen atom, a methoxy group —OMe, a hydroxyl group, where appropriate protected by a protective group of a hydroxyl function, or a unit R5 represents a hydrogen atom, a protective group of a hydroxyl function or a unit; A represents an oxygen atom, a sulfur atom, an —NH group or an —NR′ group; and R′1, R′2, R′3 and R′4 each represent a hydrogen atom or a substituent not including a mesomeric-effect electron-withdrawing group conjugated to the aromatic ring, a substituent from R′1, R′2, R′3 and R′4 representing the covalent bond with the benzylic carbon.