Process for making esters of 2-acetoxyalkanoic acids using a 3,6-dialkyl-1,4-dioxane-2,5-dione or poly-(alpha-hydroxyalkanoic acid) as a starting material
US10385002B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Feb 23, 2015 |
| Grant date | Aug 20, 2019 |
| Priority date | — |
| Expiry date | Feb 23, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
2-Acetoxyalkanoic acid esters are made in a reaction of a 3,6-dialkyl-1,4-dioxane-2,5-dione or a poly(α-hydroxyalkanoic acid), an acetate ester and an alcohol or phenol in the presence of a transesterification catalyst. Unlike previous methods for making 2-acetoxyalkanoic acid esters, this process proceeds in high yield and high selectivity to the desired product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.