Process for bicyclic diketones

Details Process for bicyclic diketones Process for bicyclic diketones

1982-03-29

1985-01-22

Hollrah, Glennon H.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546 84, 546149, 546150, 546283, 546315, C07D21704

Patent

active

044953542

ABSTRACT:
The preparation of bicyclic diketones of the formula ##STR1## wherein R.sub.1 is lower alkyl or ar-lower alkyl from a compound of the formula ##STR2## wherein R.sub.1 is as previously described or a salt thereof, and a di-lower alkyl malonate is described. The reactants are combined in a reaction sequence consisting of Michael addition, cyclization, hydrolysis, and decarboxylation. The preparation of the compounds of formula II is also described.

REFERENCES:
patent: 4260762 (1981-04-01), Berger et al.
patent: 4334070 (1982-06-01), Berger et al.

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