申请人:——
公开号:US20030236302A1
公开(公告)日:2003-12-25
This invention features a 5,6-dihydro-2-pyrone compound of formula (I), wherein R
1
is H, OH, or C
2
˜C
5
alkoxyl; and R
2
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 R
3
, R
4
, or R
5
; each of R
3
, R
4
, and R
5
, independently, is Cl, F, Br, I, CN, C
1
˜C
5
alkyl, C
1
˜C
5
alkoxyl, C
3
˜C
5
alkenyloxy, C
4
˜C
6
cycloalkoxyl, C
4
˜C
8
cycloalkyl alkoxyl, C
3
˜C
5
alkoxy alkoxyl, or C
1
˜C
4
alkoxy carbonyl.
这项发明涉及一种式(I)的5,6-二氢-2-吡喃化合物,其中R1为H、OH或C2~C5烷氧基;R2为2-苯乙基、2-苯乙烯基、2-杂环芳基乙基或2-杂环芳基烯基;其中苯基或杂环芳基可选择性地单取代、双取代或三取代为R3、R4或R5;R3、R4和R5中的每一个独立地为Cl、F、Br、I、CN、C1~C5烷基、C1~C5烷氧基、C3~C5烯氧基、C4~C6环烷氧基、C4~C8环烷基烷氧基、C3~C5烷氧基烷氧基或C1~C4烷氧基羰基。