Preparation method of vascular leakage blockers with a high yield
US11453698B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Jul 28, 2020 |
| Grant date | Sep 27, 2022 |
| Priority date | — |
| Expiry date | Jul 28, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07J17/005
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a preparation method of a novel vascular leakage blocker with a high yield. The preparation method is easy to react and more productive and economical than the conventional method by using an intermediate that can easily remove impurities generated during the reaction. In addition, the preparation method can produce a novel vascular leakage blocker with a high yield by using a new reagent that has not been previously used in the step of generating an isomer, and is very advantageous in producing a high-quality active pharmaceutical ingredient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.