Process to produce (1r,4r)-4-substituted cyclohexane-1-amines
US-2025122542-A1 · Apr 17, 2025 · US
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by separation of optical isomers
by separation of optical isomers · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C07C227/34 |
| Official title | by separation of optical isomers |
| Display label | by separation of optical isomers |
| Total patents | 14 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 2 |
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 1 |
| 2020 | 1 |
| 2021 | 1 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Chiral resolution method mimicking magnetic beneficiation and the magnetic nano-inhibitors for selective enrichment
US-12104022-B2 · Oct 1, 2024 · US
A chiral resolution method mimicking magnetic beneficiation and the magnetic nano-inhibitors for selective enrichment
US-2021163695-A1 · Jun 3, 2021 · US
Method for synthesizing novel chiral ligand, metal chelate, a variety of non-natural amino acids, maraviroc and key intermediate thereof
US-10875883-B2 · Dec 29, 2020 · US
Method for synthesizing novel chiral ligand, metal chelate, a variety of non-natural amino acids, maraviroc and key intermediate thereof
US-2019233456-A1 · Aug 1, 2019 · US
5-substituted-5-hydroxy-5-aryl-3-oxo-pentanoate derivatives and their enantiopure forms
US-10125074-B2 · Nov 13, 2018 · US
5-substituted-5-hydroxy-5-aryl-3-oxo-pentanoate derivatives and their enantiopure forms
US-2018118648-A1 · May 3, 2018 · US
Compound, optical resolution method, and derivative of an optical isomer of an amino acid
US-9656948-B2 · May 23, 2017 · US
Process for preparing fluoroleucine alkyl esters
US-9493400-B2 · Nov 15, 2016 · US
Compound, optical resolution method, and derivative of an optical isomer of an amino acid
US-2016039743-A1 · Feb 11, 2016 · US
Methods for producing bicyclic compounds via iminium salt
US-9206104-B2 · Dec 8, 2015 · US
Compound, optical resolution method, and derivative of an optical isomer of an amino acid
US-9193684-B2 · Nov 24, 2015 · US
Compound, optical resolution method, and derivative of an optical isomer of an amino acid
US-2015065716-A1 · Mar 5, 2015 · US
Process for preparing fluoroleucine alkyl esters
US-2015045575-A1 · Feb 12, 2015 · US