Process for preparing cyclic terpenoids

Details Process for preparing cyclic terpenoids Process for preparing cyclic terpenoids

1988-03-07

1990-05-08

Ceperley, Mary E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Sulfur containing

C07C14706

Patent

active

049240307

ABSTRACT:
A present invention provides a process for preparing a mixture of cyclic terpenoids of general formula (I), ##STR1## wherein R is a hydrogen atom or a lower alkyl group, and general formula (II), ##STR2## wherein R is defined as above, containing (I) predominant over (II) by the reaction of an acid with a cyclic terpenoid of general formula (II), or a mixture of cyclic terpenoids of general formulas (I) and (II), containing (II) predominant over (I).

REFERENCES:
S. Torii et al., Chem. Abstracts, vol. 83, No. 59073t (1975).
J. Am. Chem. Soc., (1984), vol. 106, pp. 3670-3672, "Novel Sysntheis of Acetylenes and Polyenes Via Desulfonylation Reaction", T. Mandai, et al.
J. Org. Chem., (1986), vol. 51, pp. 3834-3838, "Stereocontrolled Synthesis of Vitamin A Through A Double Elimination Reaction. A Novel Convergent C.sub.10 +C.sub.10 Route", J. Otera, et al.
Bull. Chem. Soc. Japan., (1985), vol. 58, pp. 1859-1860, "Electrogenerated Acid-Catalyzed Cyclization of Isoprenoids", Kenji Uneyame, et al.
Chemistry Letters, (1975), vol. 5, pp. 479-482, "Alicyclic Terpenoids From Cyclocitral Phenyl Sulfides. I. Acid-Catalyzed Cyclization of Geranyl Phenyl Sulfides to Cyclocitral Derivatives. A Synthesis of .alpha.-And .beta.-Ionones", Sigeru Torii, et al.

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