Calixarene compound, curable composition and cured product

A calixarene compound represented by structural formula (1) below:

• [wherein
• R1 and R2 each independently represent a structural moiety (A) having a functional group (I) selected from the group consisting of a cyano group, maleate groups, an acetylacetonate group, oxalate groups, and malonate groups, a structural moiety (B) having a functional group (II) having a carbon-carbon unsaturated bond (excluding maleate groups), a structural moiety (C) having both the functional group (I) and the functional group (II), a monovalent organic group (D) that has 1 to 20 carbon atoms and is other than the structural moieties (A), (B) and (C), or a hydrogen atom (E);
• R3 represents a hydrogen atom, an aliphatic hydrocarbon group optionally having a substituent, or an aryl group optionally having a substituent;
• n is an integer of 2 to 10;
• *s indicate the points of attachment to the aromatic ring;
• a plurality of R1s may be the same or different:
• a plurality of R2s may be the same or different;
• and a plurality of R3s may be the same or different,
• provided that at least one of the plurality of R2s is the structural moiety (A), the structural moiety (B), the structural moiety (C), or the organic group (D);
• when the functional group (I) is a cyano group, an acetylacetonate group, an oxalate group, or a malonate group, at least one of the plurality of R1s and the plurality of R2s is the structural moiety (C), or at least one of the plurality of R1s and the plurality of R2s is the structural moiety (A) and at least another one of the plurality of R1s and the plurality of R2s is the structural moiety (B);
• and
• when the functional group (I) is a maleate group, at least one of the plurality of R1s and the plurality of R2s is the structural moiety (A) or the structural moiety (C)].