JP2003127542A5 - - Google Patents

Claims (3)

An optical recording medium in which a recording layer capable of recording and / or reproducing information by a laser is provided on a substrate, and the carbostyryl compound represented by the following general formula [I] or 1,8 An optical recording medium containing a naphthyridine compound.

(In the formula, X represents a nitrogen atom or C—R _6. R ₁ represents an arbitrary substituent. R ₂ , R ₄ , R ₅ and R ₆ represent a hydrogen atom. R ₃ has a substituent. Alkyl group, cycloalkyl group, alkenyl group, cycloalkenyl group, alkoxy group, alkylthio group, aralkyl group, alkenyloxy group, aryl group, saturated or unsaturated heterocyclic group, halogen atom, nitro group, It is a group selected from cyano group, formyl group, hydroxy group, carboxyl group, sulfonic acid group, amino group, acylamino group, carbamate group, sulfonamide group, carbamoyl group, carboxylic acid ester group, sulfamoyl group and sulfonic acid ester group. R ₇ and R ₈ are each independently an optionally substituted alkyl group, alkenyl group, aralkyl group, or acyl group, or R 7 ₇ and R ₈ may not be bonded , and one or more of R ₇ and R ₆ and R ₈ and R ₅ may be bonded to form a ring.) In the general formula [I], R ₁ may be substituted from an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, an aralkyl group, an aryl group, a saturated or unsaturated heterocyclic group, and an acyl group. The optical recording medium according to claim 1, wherein the optical recording medium represents a selected group. The optical recording medium according to claim 1 or 2 , wherein a laser beam wavelength for recording and / or reproducing information is 350 nm to 530 nm.