Novel chemo-enzymatic process for the preparation of opticaly enriched beta-benzyl-gamma-butyrolactones
申请人:Council of Scientific and Industrial Research
公开号:US20040014993A1
公开(公告)日:2004-01-22
The present invention relates to a novel process for the preparation of optically enriched substituted R(+)&bgr;-benzyl-&ggr;-butyrolactones of the general formula 1,
1
wherein,
R
1
and R
2
independently represent the following groups,
R
1
═R
2
═H, OH, —OC
n
H
2n+1 (
n=1 to 8), NH
2
, and/or CF
3
,
R
1
and R
2
together represents —O(CH
2
)
m
O— where m=2 to 4.
Oxyfunctionalization of abundant carboxylic acids represents a direct approach to synthesizing α-hydroxyacids, which are valuable intermediates of various active pharmaceutical ingredients. Although ideal, the transformation is yet to be accomplished. Herein, enantiocomplementary C(sp3)–H oxyfunctionalization for the synthesis of α-hydroxyacids was realized by a cooperative strategy of substrate