Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1979-11-21
1981-09-01
Jiles, Henry R.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
546 17, 546 18, 252300, C07D51510, C07D491107
Patent
active
042873371
ABSTRACT:
The invention relates to spiropyran compounds. They have the general formula (I): ##STR1## in which: X represents the CH.sub.2 group or a sulfur atom; R.sub.1 and R.sub.2 represent electron donor and/or acceptor groups selected for instance from the group NO.sub.2, COC.sub.6 H.sub.5, CN, the halogens, the acyl substituents, alkoxy substituents, the hydrogen atom, the alkyl and mercaptoalkyl groups, the ethers of the formula CH.sub.2 OR, thioethers of the formula CH.sub.2 SR and amines of the formula CH.sub.2 NR.sub.2 in which R represents an alkyl group; R.sub.3 is a linear or branched alkyl group, having 1 to 18 carbon atoms, or an arylalkyl or alkenyl group.
REFERENCES:
patent: 3320067 (1967-05-01), Taylor
Maguet et al., J. Heterocyclic Chem. vol. 15, Dec. 1978, pp. 1439-1446.
Garnier Francis
Guglielmetti Robert J.
Petillon Gisele M. C.
Poirier Yves M.
Dentz Bernard
Etat Francais (represente par le Delegue General pour l'Armement
Jiles Henry R.
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