Synthesis of substituted furans
US11584730B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Jul 20, 2020 |
| Grant date | Feb 21, 2023 |
| Priority date | — |
| Expiry date | Jul 20, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G6/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method is provided of preparing a compound of formula II: where: R1 and R2 are independently selected from —CH2OR′, —CHO, —COOR′ and —H, provided that R1 and R2 are not both —H; and R′ is selected from —H and C1-6 hydrocarbyl groups, from a compound of formula I: the compounds of formulas I and II being optionally in the form of a salt. The method comprises dehydrating the compound of formula I at: a pH in the range of from 0 to 6 or 8 to 11.5; and a temperature in the range of from 10 to 80° C. The method is particularly useful for synthesizing substituted furans from compounds derived from sugars.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.