Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system
Patent
1993-03-19
1996-06-18
Bowers, Jr., Charles L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Four or more ring nitrogens in the bicyclo ring system
544234, 544345, 546 89, C07D49112
Patent
active
055279112
ABSTRACT:
The invention relates to photochromic compounds of general formula: ##STR1## in which R.sup.a, R.sup.b and R.sup.c denote hydrogen; alkyl; aryl; OR, SR, COR or COOR, in which R denotes hydrogen, alkyl or aryl, amino of formula NR.sub.1 R.sub.2 in which R.sub.1 and R.sub.2 denote hydrogen, alkyl, cycloalkyl, aryl, R.sub.1 and R.sub.2 being capable of forming with the nitrogen atom, a heterocycle containing 4 to 7 members and capable of containing, in addition, one or more heteroatoms chosen from nitrogen, oxygen, sulfur, a halogen atom; a mono- or polyhaloalkyl group; an NO.sub.2, CN or SCN group; n and m denote integers from 1 to 5 depending on the number of substitutions on the nucleus and p may be equal to 1 or 2 depending on the number of substitutions on the nucleus; H is an aromatic heterocycle having 4 to 7 members containing one or more heteroatoms chosen from nitrogen, oxygen, sulfur, these heterocyclic nuclei being capable of being substituted by one or more alkyl, alkoxy, amino, aryl or aralkyl groups or condensed with an aromatic nucleus, and to their use in ophthalmic optics.
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Guglielmetti Robert
Pozzo Jean L.
Samat Andre
Bowers Jr. Charles L.
Essilor International
McPherson John A.
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