C07C 227/30
Preparation of optical isomers
C07C227/30 (Preparation of optical isomers) appears on 345 US grants and 242 published applications in this corpus.
Search patents in C07C- Granted patents
- 345
- Published applications
- 242
- Assignees
- 213
- Inventors
- 920
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 4 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 14 | 0 |
| 1991 | 8 | 0 |
| 1992 | 7 | 0 |
| 1993 | 2 | 0 |
| 1994 | 6 | 0 |
| 1995 | 5 | 0 |
| 1996 | 13 | 0 |
| 1997 | 12 | 0 |
| 1998 | 11 | 0 |
| 1999 | 8 | 0 |
| 2000 | 14 | 0 |
| 2001 | 9 | 6 |
| 2002 | 15 | 12 |
| 2003 | 13 | 16 |
| 2004 | 14 | 18 |
| 2005 | 6 | 17 |
| 2006 | 15 | 15 |
| 2007 | 10 | 14 |
| 2008 | 17 | 18 |
| 2009 | 11 | 20 |
| 2010 | 13 | 10 |
| 2011 | 9 | 14 |
| 2012 | 10 | 14 |
| 2013 | 10 | 5 |
| 2014 | 9 | 9 |
| 2015 | 12 | 12 |
| 2016 | 9 | 6 |
| 2017 | 8 | 4 |
| 2018 | 3 | 3 |
| 2019 | 5 | 7 |
| 2020 | 4 | 3 |
| 2021 | 1 | 6 |
| 2022 | 3 | 4 |
| 2023 | 1 | 2 |
| 2024 | 4 | 1 |
| 2025 | 1 | 4 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for preparing chiral 4-aryl-β-amino acid derivative27 Jan 2026US 12,534,427 B2Zhejiang Medicine Co., Ltd.Xinchang Pharmaceutical Factory
- Processes for the preparation of deuterated D-serine18 Nov 2025US 12,473,252 B2Sun Pharmaceutical Industries Limited
- Chiral resolution method mimicking magnetic beneficiation and the magnetic nano-inhibitors for selective enrichment1 Oct 2024US 12,104,022 B2Peking University
- Processes for the preparation of deuterated D-serine20 Aug 2024US 12,065,395 B2Sun Pharmaceutical Industries Limited
- Use of stereoselective transaminase in asymmetric synthesis of chiral amine23 Apr 2024US 11,965,193 B2Abiochem Biotechnology Co., Ltd.
- Method for resolving phenylalanine derivative, and intermediate14 May 2026US 2026/0132101 A1Neuboron Bio-Scitech Co., Ltd.
- Methods for preparing (2s,3r,4r)-4,5-dihydroxyisoleucine derivative and intermediates thereof1 Jan 2026US 2026/0001836 A1Inner Mongolia Duhe Innovation R & D Tech Co., Ltd
- Process for the Preparation of R-Oxybutynin Hydrochloride13 Nov 2025US 2025/0346553 A1Harman Finochem Limited
- Enantioselective methods for preparing chiral amine intermediates3 Jul 2025US 2025/0215465 A1
- Process to produce (1r,4r)-4-substituted cyclohexane-1-amines17 Apr 2025US 2025/0122542 A1Budapesti Muszaki Es Gazdasagtudomanyi Egyetem
Most cited
By later US patents
- Liquid electrolyte lithium-sulfur batteries209US 6,030,720 APolyPlus Battery Company · 2000
- Rechargeable positive electrodes193US 5,686,201 APolyPlus Battery Company · 1997
- Rechargeable positive electrodes178US 5,814,420 APolyPlus Battery Company · 1998
- Compounds containing a fused bicycle ring and processes therefor171US 5,508,272 ABristol-Myers Squibb Company · 1996
- Liquid electrolyte lithium-sulfur batteries125US 6,358,643 B1PolyPlus Battery Company · 2002