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36--56--4---2- SYNTHESIS OF 36-DIALKYL-56-DIHYDRO-4-HYDROXY-PYRAN-2-ONE
36--56--4---2- SYNTHESIS OF 36-DIALKYL-56-DIHYDRO-4-HYDROXY-PYRAN-2-ONE
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机译：36--56--4 --- 2-36-二烷基-56-二氢-4-羟基-吡喃-2-酮的合成
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摘要
The present invention relates to a new method, and also novel intermediates for preparing the δ- lactone of formula (I) using an acyl halide of the following general formula (1):; Formula I; Wherein; R 1, R 2, R 3 and X are as defined herein.; In particular, the present invention provides (R) relates to a production method of enantiomers optionally -δ- lactone.
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机译：本发明涉及一种使用以下通式（1）的酰基卤制备式（I）的δ-内酯的新方法，以及新的中间体：一级方程式其中R 1， R 2， R 3 和X如本文所定义。特别地，本发明提供了（R）涉及对映异构体任选地-δ-内酯的制备方法。
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