Process for the preparation of trans-.DELTA..sup.9 -isoambrettol

Details Process for the preparation of trans-.DELTA..sup.9 -isoambrettol Process for the preparation of trans-.DELTA..sup.9 -isoambrettol

1976-12-22

1977-12-20

Milestone, Norma S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D31300

Patent

active

040641449

ABSTRACT:
A process is described for producing trans-.DELTA..sup.9 -isoambrettolide from aleuritic acid in three reaction steps; first forming a dioxolane by treatment with an excess amount of an orthoformate or a dialkyl formamide dialkyl acetal; then forming the corresponding bengalene acid derivative by heating the dioxolane with acetic anhydride; and then cyclizing the resulting trans bengalene acid derivative by heating it, thereby yielding a high quality substantially pure or 100% pure trans-.DELTA..sup.9 -isoambrettolide.

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