Journal of the Chemical Society. Perkin transactions I p. 146 - 149 (1981)
Update date:2022-08-06
Topics:
Briggs, Stuart P.
Davies, David I.
Newton, Roger F.
Reynolds, Derek P.
In non-polar solvents glutaconic anhydride exists predominantly as its dioxo-tautomer (1).Diels-Alder reaction with cyclopentadiene affords 3-endo-carboxynorborn-5-en-2-endo-ylacetic acid anhydride (5) having considerable synthetic potential, and which on hydrolysis gives the corresponding bis-endo-dicarboxylic acid (6a).The dimethyl ester of (6a) may be epimerised and hydrolysed to the trans-dicarboxylic acid, 3-exo-carboxynorborn-5-en-2-endo-ylacetic acid (9a).The acids (6a) and (9a) have been characterised as a γ-iodolactone (7a) and a δ-iodolactone (13), respectively.
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