Patent ID: 7557206
Filing Date: 2009-07-07
Classification: C07D,C09B,C09K,G02B,G02F,G03C

Abstract:
1. A photochromic compound having: (a) at least one photochromic group represented by Formula II or XII:  and (b) at least one lengthening agent L  wherein: (c) A is chosen from naphtho, benzo, phenanthro, fluorantheno, antheno, quinolino, thieno, furo, indolo, indolino, indeno, benzofuro, benzothieno, thiopheno, indeno-fused naphtho, heterocyclic-fused naphtho, and heterocyclic-fused benzo; (d) Y is C; (e) SP is a spiro-group chosen from indolino and benzindolino; (f) B and B′ are each independently chosen from: wherein each substituent is independently chosen for each occurrence from: (vi) an unsubstituted or mono-substituted group chosen from pyrazolyl, imidazolyl, pyrazolinyl, imidazolinyl, pyrrolidinyl, phenothiazinyl, phenoxazinyl, phenazinyl, or acridinyl, wherein each substituent is independently chosen from a lengthening agent L (vii) a group represented by Formula iv or v:  wherein (viii) a group represented by Formula vi:  wherein (ix) B and B′ together form fluoren-9-ylidene, mono- or di-substituted fluoren-9-ylidene, or a saturated C (g) i is an integer chosen from 0 to the total number of available positions on A, r is an integer chosen from 0 to the total number available positions on SP, provided that the sum of i+r is at least one, and each R (i) a group represented by B; (ii) —C(O)X (iii) —OX (iv) —SX (v) the nitrogen containing ring represented by Formula i; (vi) the group represented by Formula ii or iii; (vii) immediately adjacent R  wherein