SYNTHETIC DERIVATIVES

摘要

This invention features a 5,6-dihydro-2-pyrone compound of formula (1), wherein R1 is H, OH, or C2~C5 alkoxyl; and R2 is 2-phenyl ethyl, 2-phenyl ethenyl, 2-heteroaryl ethyl, or 2-heteroaryl ethenyl; in which the phenyl or the heteroaryl is optionally mono-, di-, or tri- substituted with R3, R4, or R5; each of R3, R4, and R5, independently, is Cl, F, Br, 1, CN, C1~C5 alkyl, C1~C5 alkoxyl, C3~C5 alkenyloxy, C4~C6 cycloalkoxyl, C4~C8 cycloalkyl alkoxyl, C3~C5 alkoxy alkoxyl, or C1~C4 alkoxy carbonyl.