Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1993-06-15
1995-03-21
Ivy, C. Warren
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C07D30930
Patent
active
053997204
ABSTRACT:
The invention relates to a novel process for producing a compound having the formula ##STR1## wherein R.sup.1, R.sup.2 and X are described herein, via corresponding .beta.-keto- and .beta.-hydroxy-.delta.-lactones, as well as novel intermediates which occur in the process.
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Karpf Martin
Zutter Ulrich
Covington Raymond
Gould George M.
Hoffmann-La Roche Inc.
Ivy C. Warren
Johnston George W.
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