Heterocyclic compounds and optical recording materials

Abstract

The heterocyclic compound of the present invention is represented by general formula (I) and is suitable to forming an optical recording layer in an optical recording medium to which short-wavelength light is applied for recording and playing-back. (In the formula, ring A represents a benzene or naphthalene ring optionally substituted with an alkyl, haloalkyl, alkoxy, haloalkoxy or amido group having 1 to 8 carbon atoms, a halogen atom, a cyano group, a nitro group, a sulfonyl or sulfinyl group containing a hydrocarbon group having 1 to 12 carbon atoms, or an alkylamino or dialkylamino group wherein each alkyl has 1 to 8 carbon atoms; X represents CRR, NY, O, S, or Se atom, wherein Rand Reach represent a hydrocarbon group having 1 to 12 carbon atoms, which may be united to form a 3- to 6-membered ring, and Y represents a hydrogen atom or an organic group having 1 to 30 carbon atoms; Rand Reach represent independently a hydrogen atom, a halogen atom, a cyano group, an alkyl group having 1 to 4 carbon atoms, or an aralkyl group having 7 to 18 carbon atoms; Rand Reach represent independently a hydrocarbon group having 1 to 4 carbon atoms or are united to form a heterocycle free from multiple bonds; Yrepresents a hydrogen atom, an organic group having 1 to 30 carbon atoms, or a group represented by general formula (II); Anrepresents a q-valent anion; q represents 1 or 2; and p represents a coefficient for satisfying the electric charge neutrality.)