Synthetic derivatives
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United States of America Patent
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Issued Date -
Dec 25, 2003
app pub date -
Feb 27, 2003
filing date -
Feb 27, 2002
priority date (Note) -
Abandoned
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Abstract
This invention features a 5,6-dihydro-2-pyrone compound of formula (I), wherein R.sub.1 is H, OH, or C.sub.2.about.C.sub.5 alkoxyl; and R.sub.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.sub.3, R.sub.4, or R.sub.5; each of R.sub.3, R.sub.4, and R.sub.5, independently, is Cl, F, Br, I, CN, C.sub.1.about.C.sub.5 alkyl, C.sub.1.about.C.sub.5 alkoxyl, C.sub.3.about.C.sub.5 alkenyloxy, C.sub.4.about.C.sub.6 cycloalkoxyl, C.sub.4.about.C.sub.8 cycloalkyl alkoxyl, C.sub.3.about.C.sub.5 alkoxy alkoxyl, or C.sub.1.about.C.sub.4 alkoxy carbonyl.
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