Cyanate ester compound, curable resin composition containing said compound, and cured product of said composition

A cyanate ester compound obtained by cyanating a modified naphthalene formaldehyde resin, wherein the cyanate ester compound has a structure represented by the following formula (1):

• wherein Ar1 represents an aromatic ring;
• R1 each independently represents a methylene group, a methyleneoxy group, a methyleneoxymethylene group, or an oxymethylene group, and the methylene group, the methyleneoxy group, the methyleneoxymethylene group, and the oxymethylene group may be linked;
• R2 represents a monovalent substituent and each independently represents a hydrogen atom, an alkyl group, or an aryl group;
• R3 each independently represents a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, an aryl group, a hydroxy group, or a hydroxymethylene group;
• m represents an integer of 1 or more, and n represents an integer of 0 or more;
• wherein m and n are not the same;
• arrangement of repeating units is arbitrary;
• l represents a number of bonded cyanato groups and is an integer of 1 to 3;
• x represents a number of bonded R2 and is “a number of possible bonds of Ar1-(1+2)”;
• and
• y represents an integer of 0 to 4.