Soochow University Patent: Aniline Acid Anhydride Preparation Method
Summary
The USPTO granted Patent US12606530B2 to Soochow University on April 21, 2026, covering an aniline acid anhydride, its preparation method, and a polyaminoacid graft chain. The preparation involves an addition-elimination reaction between N-phenyl amino acid and Boc anhydride under acidic conditions, followed by cyclization under nitrogen to obtain the aniline anhydride. The polyaminoacid graft chain is intended for covalent bonding with fiber materials to improve water-repellent fabric fastness while maintaining wearability.
“Disclosed are an aniline anhydride, a preparation method therefor, and a polyaminoacid graft chain.”
What changed
The USPTO issued a patent grant for US12606530B2 to Soochow University, covering an aniline acid anhydride compound, its preparation method via addition-elimination and cyclization reactions, and a polyaminoacid graft chain. The patent includes four claims across multiple CPC classifications spanning heterocyclic chemistry (C07D), polymers (C08G), and textile treatments (D06M).
For parties seeking to develop or manufacture similar aniline anhydride compounds or polyaminoacid graft chains for textile applications, this grant establishes Soochow University's priority in this chemical space. Potential infringers should conduct freedom-to-operate analyses before commercializing products falling within the scope of these claims.
Archived snapshot
Apr 21, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
Aniline acid anhydride, preparation method therefor, and polyamino acid-grafted chain
Grant US12606530B2 Kind: B2 Apr 21, 2026
Assignee
SOOCHOW UNIVERSITY
Inventors
Zhanxiong Li
Abstract
Disclosed are an aniline anhydride, a preparation method therefor, and a polyaminoacid graft chain. In the presence of an acid binding agent, an addition-elimination reaction is carried out between N-phenyl amino acid and Boc anhydride to obtain N-phenyl-Boc-glycine; and under a nitrogen atmosphere, the N-phenyl-Boc-glycine is subject to cyclization to obtain the aniline anhydride. The polyaminoacid graft chain can be obtained using the aniline anhydride disclosed by means of chemical grafting and thus be covalently bonded with fiber. The fastness is high, the wearability of fabric is not affected, and the problem of low fastness of water-repellent fabric obtained by coating is solved. The polyaminoacid graft chain is biocompatible, naturally degradable and environmentally friendly, and is consistent with the current trend of developing green chemicals.
CPC Classifications
C07D 263/44 C07D 263/08 C07D 263/34 C07D 263/36 C08G 69/10 C08G 69/48 D06M 14/04 D06M 14/06 D06M 15/595 D06M 2101/06 D06M 2101/10 D06M 2101/12 D06M 2200/12
Filing Date
2021-01-27
Application No.
18028542
Claims
4
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