C07C 231/16
Preparation of optical isomers
C07C231/16 (Preparation of optical isomers) appears on 274 US grants and 213 published applications in this corpus.
Search patents in C07C- Granted patents
- 274
- Published applications
- 213
- Assignees
- 176
- Inventors
- 736
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 6 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 9 | 0 |
| 1995 | 4 | 0 |
| 1996 | 10 | 0 |
| 1997 | 11 | 0 |
| 1998 | 5 | 0 |
| 1999 | 13 | 0 |
| 2000 | 10 | 0 |
| 2001 | 8 | 3 |
| 2002 | 10 | 9 |
| 2003 | 18 | 16 |
| 2004 | 8 | 13 |
| 2005 | 8 | 13 |
| 2006 | 7 | 11 |
| 2007 | 10 | 17 |
| 2008 | 8 | 11 |
| 2009 | 10 | 20 |
| 2010 | 12 | 12 |
| 2011 | 7 | 12 |
| 2012 | 15 | 17 |
| 2013 | 16 | 14 |
| 2014 | 10 | 10 |
| 2015 | 10 | 5 |
| 2016 | 9 | 4 |
| 2017 | 3 | 1 |
| 2018 | 2 | 4 |
| 2019 | 1 | 2 |
| 2020 | 2 | 3 |
| 2021 | 3 | 6 |
| 2022 | 2 | 4 |
| 2023 | 3 | 4 |
| 2024 | 6 | 2 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Process of making 3-(4′-aminophenyl)-2-methoxypropionic acid, and analogs and intermediates thereof30 Dec 2025US 12,509,416 B2Nogra Pharma Limited
- Processes for the preparation of (S)-tert-butyl 4,5-diamino-5-oxopentanoate7 Oct 2025US 12,435,028 B2Celgene Corporation
- Metal complex, intermediate, and preparation method and application thereof8 Oct 2024US 12,110,302 B2Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences
- Composition of acylethanolamides from olive oil fatty acids1 Oct 2024US 12,102,608 B2Epitech Group S.r.l.
- Chiral resolution method mimicking magnetic beneficiation and the magnetic nano-inhibitors for selective enrichment1 Oct 2024US 12,104,022 B2Peking University
- Process of making 3-(4'-aminophenyl)-2-methoxypropionic acid, and analogs and intermediates thereof12 Dec 2024US 2024/0409498 A1Nogra Pharma Limited
- Processes for the preparation of (s)-tert-butyl 4,5-diamino-5-oxopentanoate25 Jul 2024US 2024/0246899 A1Celgene Corporation
- Processes for the preparation of (s)-tert-butyl 4,5-diamino-5-oxopentanoate27 Jul 2023US 2023/0234914 A1Celgene Corporation
- Process for preparing 2-methyl-n-(2' -methylbutyl)butanamide29 Jun 2023US 2023/0202968 A1Shin-Etsu Chemical Co., Ltd.
- Metal complex, intermediate, and preparation method and application thereof13 Apr 2023US 2023/0114794 A1Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences
Most cited
By later US patents
- Compositions containing and methods of using 1-aminoindan and derivatives thereof and process for preparing optically active 1-aminoindan derivatives68US 5,877,218 ATeva Pharmaceutical Industries Ltd. · 1999
- Amino alcohol derivative and method for preparing the same33US 6,335,444 B12002
- Compositions containing and methods of using 1-aminoindan and derivatives thereof and process for preparing optically active 1-aminoindan derivatives32US 5,914,349 ATeva Pharmaceutical Industries Ltd. · 1999
- Compositions containing and methods of using 1-aminoindan and derivatives thereof and process for preparing optically active 1-aminoindan derivatives31US 5,877,221 ATechnion Research & Development Foundation Limited · 1999
- Ferrocenyl diphosphines as ligands for homogeneous catalysts30US 5,371,256 ACiba-Geigy Corporation · 1994