2,7-dioxaspiro[4.4]nonane-1,6-dione → Carbon Dioxide

HRID 1080444Notes

Reaction equation

HRID 1080444 reaction equation
[C:1]1(=[O:11])[C:5]2([CH2:9][CH2:8][O:7][C:6]2=[O:10])[CH2:4][CH2:3][O:2]1>O>[C:1](=[O:11])=[O:2].[O:2]1[CH2:3][CH2:4][CH:5]([C:6]([OH:7])=[O:10])[CH2:9][CH2:8]1

Participants

4

Reactant 1

HCID 2309072,7-dioxaspiro[4.4]nonane-1,6-dione

Product 2

HCID 280Carbon DioxideHCID 219302Oxane-4-carboxylic acid

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

The 2,7-dioxaspiro[4.4]nonane-1,6-dione II can preferably be reacted in molten (m.p.: 108° to 109° C.) or dissolved form, together with the alcohol III or water and, if appropriate, an inert gas such as nitrogen, carbon dioxide or argon, to give tetrahydropyran-4-carboxylic acid and its esters I.

Workup

  1. dissolutiondissolved form

Sources & evidence

ORD record
ord-41cf9cc62f5449d29ff108d95961b3db
Source dataset
uspto-grants-1996_12
Patent number
US05580994

Reaction notes

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