SYNTHESIS OF 3,6-DIALKYL- 5,6-DIHYDRO-4- HYDROXY-2H- PYRAN-2- ONE.

摘要

The present invention relates to a novel process for producing a delta -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 delta -lactone.