| 摘要 |
<p>The present invention relates to a novel process for producing a δ-lactone of the formula (I) using an acyl halide of the formula (1) wherein R?1, R2, R3¿ and X are described herein, as well as novel intermediates. In particular, the present invention relates to a process for enantioselectively producing the (R)-δ-lactone.</p> |
