Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1990-04-09
1992-03-03
Berch, Mark L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
549265, C07D48710, C07D49310
Patent
active
050934996
ABSTRACT:
Novel monomeric compounds containing aliphatic and/or aromatic substituents on the 1,6-diazaspiro[4.4]nonane-2,7-dione ring system are produced by contacting an amine or an amine hydrohalide and a 1,6-dioxaspiro[4.4]nonane-2,7-dione or a 4-oxoheptanedioic acid. The resulting spirodilactam compounds are characterized by improved hydrolytic and thermal oxidative stability and some of the compounds are useful as intermediates to polymers containing the 1,6-diazaspiro[4.4]nonane-2,7-dione ring system.
REFERENCES:
patent: 4939251 (1990-07-01), Wang
Berch Mark L.
Shell Oil Company
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