Intermediate in the process for the preparation of trans-.DELTA.

Details Intermediate in the process for the preparation of trans-.DELTA. Intermediate in the process for the preparation of trans-.DELTA.

1976-06-09

1977-03-29

Love, Ethel G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252522, 260343, 260348C, 260484A, 260486D, 260535R, 260539R, 260586R, 260617R, 260666A, C07D31710

Patent

active

040149021

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.

REFERENCES:
patent: 3127418 (1964-03-01), Kuester

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