Patent ID: 6630607
Filing Date: 2003-10-07
Classification: C07C

Abstract:
An aromatic methylidene compound selected from the group consisting of compounds of the following general formulas (1), (1a), (1b), (1c) and (1d): wherein R11 and R21 independently in each occurrence represent an unsubstituted or substituted alkyl group, an unsubstituted or substituted alkoxy group, a halogen, a cyano group or a nitro group, n11 is an integer of 0, 1, 2, 3, 4, 5 or 6, and n21 is an integer of 0, 1, 2, 3 or 4, provided that when n11 and n21 are, respectively, an integer of 2 or more, R11's and R21's may be, respectively, the same or different, and R31 and R41 independently represent hydrogen except the case where both R31 and R41 are hydrogen at the same time, an unsubstituted or substituted alkyl group except the case where both R31 and R41 are an alkyl group at the same time, an unsubstituted or substituted cycloalkyl group except the case where both R31 and R41 are the cycloalkyl group at the same time, an unsubstituted or substituted aromatic group, or an unsubstituted or substituted aromatic heterocyclic group and may join to complete a condensed ring of unsubstituted or substituted aromatic rings or unsubstituted or substituted aromatic heterocyclic rings; wherein R11a, R21a, n11a, n21a, R31a and R41a, respectively, have the same meanings as R11, R21, n11, n21, R31 and R41 defined with respect to the formula (1); wherein R11b, R21b, n11b, n21b, R31b and R41b, respectively, have the same meanings as R11, R21, n11, n21, R31 and R41 defined with respect to the formula (1); wherein R11c, R21c, n11c, n21c, R31c and R41c, respectively, have the same meanings as R11, R21, n11, n21, R31 and R41 defined with respect to the formula (1); and wherein R11d, R21d, n11d, n21d, R31d and R41d, respectively, have the same meanings as R11, R21, n11, n21, R31 and R41 defined with respect to the formula (1).