Patent ID: 9487693
Filing Date: 2016-11-08
CPC Classification: C07C,C07D,C08L,C09K,G02B,Y10T

Claim Text:
1. A chromene compound represented by the following formula (5): wherein R 1 is a hydroxyl group, alkyl group, haloalkyl group, cycloalkyl group, alkoxy group, amino group, heterocyclic group having a ring member nitrogen atom and bonded to a benzene ring to which the heterocyclic group is bonded via the nitrogen atom, cyano group, nitro group, formyl group, hydroxycarbonyl group, alkylcarbonyl group, alkoxycarbonyl group, halogen atom, aralkyl group, aralkoxy group, aryloxy group, aryl group, heteroaryl group, alkylthio group, cycloalkylthio group, arylthio group, heteroarylthio group or group having a siloxane bond, “a” is an integer of 0 to 4, provided that when “a” is 2 to 4, a plurality of R 1 's can be the same or different, or two R 1 's are bonded together to form a ring, R 2 and R 3 are each an alkyl group, aryl group, heteroaryl group, group represented by the following formula (2), or group represented by the following formula (3): wherein R 4 is an aryl group or heteroaryl group, R 5 is a hydrogen atom, alkyl group or halogen atom, and “m” is an integer of 1 to 3, wherein R 6 is an aryl group or heteroaryl group, and “n” is an integer of 1 to 3, or R 2 and R 3 form an aliphatic ring together with carbon atoms to which R 2 and R 3 are bonded, C* is a Spiro carbon atom, a spiro ring A represented by the following formula is a saturated hydrocarbon ring or unsaturated hydrocarbon ring having 4 to 12 carbon atoms constituting the ring, and at least one ring member carbon atom constituting the Spiro ring A is a group represented by the following formula (4): wherein R