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.
本发明涉及一种用于制备通用公式1的光学富集的取代R(+)β-苄基-
γ-丁内酯的新工艺,其中,R1和R2独立地代表以下基团:R1和R2单独为H、OH、—OCnH2n+1(n=1至8)、NH2和/或
CF3,R1和R2共同代表—O(
CH2)mO—,其中m=2至4。