Process for producing chromenes by catalysis with copper salts intended for the preparation of thermosetting resins
US11739097B2 · kind B2 · utility
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Key dates
| Filing date | Jul 23, 2020 |
| Grant date | Aug 29, 2023 |
| Priority date | — |
| Expiry date | Jun 3, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2261/3242
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for producing chromenes intended for the preparation of thermosetting resins, includes converting an aromatic propargyl ether of general formula (I) into a chromene by homogeneous catalysis with copper salts in anisole at a temperature between 100 and 170° C. Moreover, a process for preparing a material made of thermoset resin, includes successively a) carrying out the above process; b) polymerizing the reaction product obtained in a) so as to obtain the material made of thermoset resin; c) recovering the material made of thermoset resin obtained in b).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.