CPC C07D 277/56 (2013.01) [C09K 11/06 (2013.01); C09K 2211/1018 (2013.01)] | 20 Claims |
1. A heterocyclic compound of formula (1):
where R1, R2, and R3 are each independently hydrogen or an alkyl group having a carbon number of 1 to 4, with provisos that R1 and R2 are optionally bonded to each other to form a ring and that one of R1 and R2 is optionally bonded to Y1 to form a ring,
X is S, O, NR4, or CH2, and Y1 and Y2 are each independently N or CR4, where each R4 is independently hydrogen, an alkyl group having a carbon number of 1 to 4, an alkenyl group having a carbon number of 2 to 4, or an acyl group having a carbon number of 2 to 4, and
n is an integer of 0 to 4.
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