Patent ID: 8293922

Claim:
A process of preparing cucurbituril represented by formula 1 below by irradiating microwave to glycoluril represented by formula 2 below and paraformaldehyde or a formaldehyde solution in the presence of an acid catalyst, wherein the microwave is irradiated at a power level of 300 to 1,600 W: wherein X is O, S, or NH; R 1 and R 2 are each independently selected from the group consisting of hydrogen, a substituted or unsubstituted alkyl group of C1-C30, a substituted or unsubstituted alkenyl group of C2-C30, a substituted or unsubstituted alkynyl group of C2-C30, a substituted or unsubstituted alkylcarboxyl group of C2-C30, a substituted or unsubstituted hydroxyalkyl group of C1-C30, a substituted or unsubstituted alkoxy group of C1-C30, a substituted or unsubstituted nitroalkyl group of C1-C30, —N(R′)(R″) where R′ and R″ are each independently hydrogen or an alkyl group of C1-C30, a substituted or unsubstituted cycloalkyl group of C5-C30, a substituted or unsubstituted heterocycloalkyl group of C2-C30, a substituted or unsubstituted aryl group of C6-C30, and a substituted or unsubstituted heteroaryl group of C2-C30; and n is an integer from 5 to 8, or 10.