Patent ID: 6294112
Filing Date: 2001-09-25
Classification: C07D

Abstract:
A red coloring photochromic naptho[2,1-b]-pryan of the general formula (I) ##STR16##wherein R.sup.1 represents either H or a group of the formula --NR.sup.2 R.sup.3 or --OR.sup.4 or SR.sup.4 or R.sup.7, and wherein when R.sup.1 is NR.sup.2 R.sup.3, each of R.sup.2 and R.sup.3, which may be the same or different, independently represents an alkyl group or a carobocyclic or heterocyclic group, or R.sup.2 and R.sup.3 taken together with the nitrogen atom to which they are attached represent a heterocyclic ring having one or more hetero atoms and which may be unsubstituted or carry at least one substituent selected from alkyl, aryl and heteroaryl groups; and wherein when R.sup.1 is OR.sup.4 or SR.sup.4, the substituent R.sup.4 represents an alkyl group, a perhaloalkyl group or an aryl or heteroaryl group,R.sup.5 represents a saturated cyclic aminoaryl substituent selected from: ##STR17##where the size of the saturated nitrogen-containing ring is from 3 to 30 atoms inclusive of the N atom and optionally may incorporate one or more of the same or different heteroatoms or groups (X) where X is O, S, NH, N-alkyl, N-aryl or N-heteroaryl; orR.sup.5 represents an indolinoaryl substitutent of the formula ##STR18##wherein R.sup.10 and R.sup.11 can, in addition to those functions specified below, be conjoined to form a ring of 5 to 8 atoms including those which comprise the indoline ring, said ring being carbocyclic or heterocyclic where one or more of the ring carbon atoms is replaced by one or more of the same or different heteroatoms selected from O, S, or N, said nitrogen atom having either an H, alkyl, aryl or heteroaryl substituent; orR.sup.5 may be of formula (II) ##STR19##in which both m and n are integers between 2 and 5 and may be the same or different; orR.sup.5 represents an unsaturated cyclic aminoaryl substituent selected from: ##STR20##and wherein R.sup.6 may be the same as or different from R.sup.5, and when R.sup.6 is different from R.sup.5 it is selected from aryl and heteroaryl groups; and wherein R.sup.7, R.sup.8, R.sup.9, R.sup.10 and R.sup.11 of which there may be multiples of either the same or different, may be selected from hydrogen, alkyl, haloalkyl, alkythio, aryl, arylthio, heteroaryl, halogen, nitrile, carboxylate, ester, nitro in addition to those substituents specified for R.sup.1, or R.sup.7 may represent a heterocyclic ring fused to faces f, g, h, i, j or k.