Method for isomerization of trans-form 2-methylspiro (1,3-oxathi

Details Method for isomerization of trans-form 2-methylspiro (1,3-oxathi Method for isomerization of trans-form 2-methylspiro (1,3-oxathi

1988-07-06

1989-08-29

Bond, Robert T.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D49520

Patent

active

048618861

ABSTRACT:
A method for isomerization of trans-form 2-methylspiro(1,3-oxathiolane-5,3')quinuclidine or acid addition salts thereof, which comprises isomerizing said trans-form quinuclidine or acid addition salts thereof to cis-form 2-methylspiro(1,3-oxathiolane-5,3')quinuclidine or acid addition salts thereof in the presence of at least one acid catalyst selected from the group consisting of an organic sulfuric acid, a halide functioning as a Lewis acid, and sulfuric acid.

REFERENCES:
patent: 4054582 (1977-10-01), Blanchard et al.
Chemical Abstract, vol. 78, No. 19, May 14, 1973, pp. 463, abstract no. 124365c, E. A. Karakhanov et al.

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