Gold-catalysed process for manufacturing chromenes intended for the preparation of thermosetting resins
US11820780B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 23, 2020 |
| Grant date | Nov 21, 2023 |
| Priority date | — |
| Expiry date | Aug 3, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2261/3242
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for manufacturing chromenes intended for the preparation of thermosetting resins, includes transforming an aromatic propargyl ether of general formula (I) into a chromene by homogeneous gold(I) catalysis with the catalyst (acetonitrile)[(2-biphenyl)di-tert-butylphosphine]gold(I) hexafluoroantimonate in an organic solvent under an inert or non-inert atmosphere. Moreover, a process for preparing a material made of thermoset resin, includes successively a) implementation of the above process; polymerization of the reaction product obtained in step a) so as to obtain the material made of thermoset resin; c) recovery of the material made of thermoset resin obtained in step b).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.