Lactones
A feed material containing the group -O-(CR2)n -CO- in a macrocyclic ring or acylic chain is heated to between 300 DEG C and 500 DEG C in the absence of a catalyst to give a mono-unsaturated acyclic carboxylic acid. For example polymeric epsilon -caprolactone gives delta - epsilon hexenoic acid. Thi...
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| Sprache: | eng |
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| Zusammenfassung: | A feed material containing the group -O-(CR2)n -CO- in a macrocyclic ring or acylic chain is heated to between 300 DEG C and 500 DEG C in the absence of a catalyst to give a mono-unsaturated acyclic carboxylic acid. For example polymeric epsilon -caprolactone gives delta - epsilon hexenoic acid. This acid is then cyclised by heating with a strong protonating agent. In the example the product is gamma -caprolactone or 4-hexanolactone. |
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