C07C 209/44
Preparation of compounds containing amino groups bound to a carbon skeleton: by
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
C07C209/44 (Preparation of compounds containing amino groups bound to a carbon skeleton: by) appears on 597 US grants and 439 published applications in this corpus.
Search patents in C07C- Granted patents
- 597
- Published applications
- 439
- Assignees
- 277
- Inventors
- 1,417
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 5 | 0 |
| 1978 | 3 | 0 |
| 1979 | 12 | 0 |
| 1980 | 10 | 0 |
| 1981 | 14 | 0 |
| 1982 | 12 | 0 |
| 1983 | 6 | 0 |
| 1984 | 8 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 7 | 0 |
| 1991 | 11 | 0 |
| 1992 | 13 | 0 |
| 1993 | 15 | 0 |
| 1994 | 13 | 0 |
| 1995 | 8 | 0 |
| 1996 | 18 | 0 |
| 1997 | 12 | 0 |
| 1998 | 13 | 0 |
| 1999 | 15 | 0 |
| 2000 | 16 | 0 |
| 2001 | 22 | 5 |
| 2002 | 19 | 16 |
| 2003 | 12 | 13 |
| 2004 | 12 | 23 |
| 2005 | 19 | 20 |
| 2006 | 11 | 10 |
| 2007 | 11 | 20 |
| 2008 | 17 | 32 |
| 2009 | 8 | 18 |
| 2010 | 13 | 31 |
| 2011 | 22 | 15 |
| 2012 | 17 | 17 |
| 2013 | 14 | 35 |
| 2014 | 14 | 16 |
| 2015 | 31 | 21 |
| 2016 | 20 | 25 |
| 2017 | 19 | 21 |
| 2018 | 16 | 10 |
| 2019 | 11 | 12 |
| 2020 | 15 | 21 |
| 2021 | 9 | 13 |
| 2022 | 8 | 13 |
| 2023 | 5 | 10 |
| 2024 | 6 | 8 |
| 2025 | 9 | 9 |
| 2026 | 3 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Process for the preparation of hexamethylenediamine by hydrogenation of adiponitrile in the presence of Raney nickel and a basic co-catalyst5 May 2026US 12,617,750 B2BASF SE
- Synthetic methods for preparation of 4-(2-chloro-4-methoxy-5-methylphenyl)-n-[(1S)-2-cyclopropyl-1-(3-fluoro-4-methylphenyl)ethyl]-5-methyl-n-prop-2-ynyl-1,3-thiazol-2-amine24 Mar 2026US 12,582,634 B2Neurocrine Biosciences, Inc.
- Materials comprising carbon-embedded nickel nanoparticles, processes for their manufacture, and use as heterogeneous catalysts10 Feb 2026US 12,544,741 B2Evonik Operations GmbH
- Property modulation with chemical transformations16 Dec 2025US 12,497,712 B2The Regents of the University of Michigan
- Hydrogenation of imines with RU complexes14 Oct 2025US 12,441,700 B2Firmenichi SA
- Sustainable preparation of hexamethylene diisocyanate for the production of polyurethane17 Sep 2026US 2026/0274787 A1Covestro Deutschland AG
- Method for recycling a polyamide under acidic conditions27 Aug 2026US 2026/0250482 A1Syensqo Specialty Polymers USA, LLC
- Process for the preparation of hexamethylenediamine by hydrogenation of adiponitrile in the presence of raney nickel and a basic co-catalyst20 Aug 2026US 2026/0242328 A1BASF SE
- Regio-controllable [2+2] benzannulation with two adjacent c(sp3)-h bonds20 Aug 2026US 2026/0242341 A1The Scripps Research Institute
- Alkylating agents for quaternary ammonium compounds6 Aug 2026US 2026/0225992 A1Afton Chemical Corporation
Most cited
By later US patents
- Process for preparing optically active compounds54US 6,184,381 B2Asahi Kasei Kogyo Kabushiki Kaisha · 2001
- Process for the preparation of chiral 1-aryl-2-aminopropanes41US 5,360,724 ACelgene Corporation · 1994
- Raney iron catalyst and a process for hydrogenating organic compounds using said catalyst36US 6,087,296 AE. I. Du Pont de Nemours and Company · 2000
- Process for simultaneously preparing caprolactam and hexamethylene diamine36US 6,147,208 ABASF SE · 2000
- Process for the preparation of optically active secondary amines33US 5,011,995 ACiba-Geigy Corporation · 1991