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by reduction of carboxylic acids or esters thereof in presence of ammonia or amines, or by reduction of nitriles, carboxylic acid amides, imines or imino-ethers

by reduction of carboxylic acids or esters thereof in presence of ammonia or amines, or by reduction of nitriles, carboxylic acid amides, imines or imino-ethers · Cooperative Patent Classification (CPC)

Chemical and metallurgical processes, compounds, and materials.

Related technology areas

Mapped technology topics for this CPC code.

Chemistry & Metallurgy

CPC classification statistics
Metric	Value
CPC code	C07C209/44
Official title	by reduction of carboxylic acids or esters thereof in presence of ammonia or amines, or by reduction of nitriles, carboxylic acid amides, imines or imino-ethers
Display label	by reduction of carboxylic acids or esters thereof in presence of ammonia or amines, or by reduction of nitriles, carboxylic acid amides, imines or imino-ethers
Total patents	16

Filing trend

Year-over-year patent counts classified under this CPC code.

Filing activity over the last five years is stable.

Patents filed per year
Year	Patents
2016	2
2017	5
2018	1
2020	1
2021	2
2022	1
2023	2
2025	1
2026	1

Representative patents

Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.

Solid forms of fasoracetam
US-2026015336-A1 · Jan 15, 2026 · US
Property modulation with chemical transformations
US-12497712-B2 · Dec 16, 2025 · US
Solid forms of fasoracetam
US-2023203001-A1 · Jun 29, 2023 · US
Solid forms of fasoracetam
US-11608324-B2 · Mar 21, 2023 · US
Viscoelastic surfactants for self-diverting acid under high temperature and preparation method
US-11453819-B2 · Sep 27, 2022 · US
Viscoelastic surfactants for self-diverting acid under high temperature and preparation method
US-2021355371-A1 · Nov 18, 2021 · US
Solid Forms of Fasoracetam
US-2021355102-A1 · Nov 18, 2021 · US
Property modulation with chemical transformations
US-2020370204-A1 · Nov 26, 2020 · US
Amide derivatives and pharmaceutically acceptable salts thereof, preparation method thereof and medicinal application thereof
US-10081629-B2 · Sep 25, 2018 · US
Transition metal-catalyzed processes for the preparation of N-allyl compounds and use thereof
US-9657030-B2 · May 23, 2017 · US
Transition metal-catalyzed processes for the preparation of N-allyl compounds and use thereof
US-9624232-B2 · Apr 18, 2017 · US
Process for preparation of tertiary alkyl primary amines
US-9617200-B2 · Apr 11, 2017 · US
Transition metal-catalyzed processes for the preparation of N-allyl compounds and use thereof
US-9593124-B2 · Mar 14, 2017 · US
Amide derivatives and pharmaceutically acceptable salts thereof, preparation method thereof and medicinal application thereof
US-2017037044-A1 · Feb 9, 2017 · US
Transition metal-catalyzed processes for the preparation of N-allyl compounds and use thereof
US-9499557-B2 · Nov 22, 2016 · US
Process for preparation of tertiary alkyl primary amines
US-2016060207-A1 · Mar 3, 2016 · US