申请人:F. HOFFMANN-LA ROCHE AG
                            
                            
                                公开号:EP1127886A1
                            
                            
                                公开(公告)日:2001-08-29
                            
                            
The present invention relates to a novel process for producing a δ-lactone of the formula:
 using an acyl halide of the formula:
 wherein R1, 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 δ-lactone.
                            本发明涉及一种生产式 δ-内酯的新工艺:
 式的δ-内酯的新工艺:
 其中 R1、R2 R3 和 X 如本文所述,以及新型中间体。本发明尤其涉及一种对映体选择性生产δ-内酯的工艺。