Process for preparing optically active .alpha.-hydroxy acids and derivatives thereof
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United States of America Patent
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Oct 28, 2003
Grant Date -
N/A
app pub date -
Oct 8, 2002
filing date -
Dec 2, 1999
priority date (Note) -
Expired
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Abstract
The present invention provides a process for preparing optically active .alpha.-hydroxy acids and derivatives thereof by subjecting the alkylated 1,3-dioxolanones of formula (IV) wherein R.sub.1 and R.sub.2 are the same or different and are each independently H or C.sub.1-6 alkyl; R.sub.5 is H, C.sub.1-16 alkyl, or unsubstituted or substituted phenyl; and R.sub.6 is C.sub.1-8 alkyl, C.sub.2-7 alkenyl or unsubstituted or substituted benzyl, to either alcoholysis or hydrolysis, in which the alkylated 1,3-dioxolanones are obtained by using 10-camphorsulfonamide as a chiral auxiliary. ##STR1##
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