Process for making tricyclodecenyl esters

C - Chemistry – Metallurgy – 07 – C

Patent

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C07C 67/04 (2006.01) C07C 69/013 (2006.01)

Patent

CA 2687600

A practical, economical process for making tricyclodecenyl esters is disclosed. After reacting a lower carboxylic acid and a dicyclopentadiene in the presence of triflic acid to form the ester, the reaction mixture is distilled in the presence of a base to isolate a fragrance-quality tricyclodecenyl ester. Adding enough base to neutralize the triflic acid enables a distillation-only purification, facilitates starting material recovery, and avoids drawbacks of a basic workup.

La présente invention concerne un procédé pratique, économique de fabrication d'esters de tricyclodécényle. Après avoir mis en réaction un acide carboxylique de faible poids moléculaire et un dicyclopentadiène en présence d'acide triflique afin de former l'ester, le mélange réactionnel est distillé en présence d'une base afin d'isoler un ester de tricyclodécényle de la qualité d'un parfum. L'ajout d'une quantité suffisante de base pour neutraliser l'acide triflique permet d'effectuer seulement une distillation en guise de purification, facilite la récupération du produit de départ, et évite les inconvénients d'un traitement final basique.

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