Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1976-06-21
1978-06-06
Trousof, Natalie
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
260 2EP, 260 25AJ, 260 457P, 260 458N, 260 775AR, 548309, 548310, 548312, 548313, C07F 965
Patent
active
040938093
ABSTRACT:
Hydantoins of the formula ##STR1## wherein R.sub.1 is hydrogen or alkyl of 1 to 8 carbon atoms, R.sub.2 is ##STR2## R.sub.3 is alkyl of 1 to 8 carbon atoms, and X is a straight or branched chain alkylene of 1 to 4 carbon atoms or a straight or branched chain alkylene of 3 to 6 carbon atoms containing an internal carbamido group; or R.sub.1 and R.sub.2 together are Y where Y is a straight or branched chain alkylene of 4 to 8 carbon atoms having a pendant ##STR3## moiety are prepared by reacting first .alpha.,.beta.-unsaturated aldehydes or ketones with alkyl phosphites to form a phosphonate aldehyde or ketone followed by a classical Bucherer hydantoin synthesis.
These compounds are intermediates for the preparation of polyglycidyl compounds useful in making flame-retardant epoxy resins. These hydantoins are also intermediates useful in preparing flame-retardant polyesters and polyurethanes.
REFERENCES:
patent: 3629263 (1971-12-01), Batzer et al.
patent: 3892765 (1975-07-01), Porret et al.
patent: 3946034 (1976-03-01), Porret et al.
patent: 3978076 (1976-08-01), Porret et al.
Porret et al., Chem. Abst. 1974, vol. 80, No. 121680g.
Porret et al., Chem. Abst. 1974, vol. 81, No. 153456a.
Gordon David A.
Hall Luther A. R.
Ciba-Geigy Corporation
Hall Luther A. R.
Trousof Natalie
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