5-benzyloxymethyl-2-(R)-methyl-(Sa)-tetradeca-3,4-dienoic acid                                                                                                                                                              在
                                                                                                                                                                                 
N,N-二异丙基乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙腈                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 (3S,6S)-6-benzyloxymethyl-3-methyl-6-nonyl-3,6-dihydropyran-2-one   、                                                                                             (3R,6R)-6-benzyloxymethyl-3-methyl-6-nonyl-3,6-dihydropyran-2-one   、                                                                                             (3S,6R)-6-benzyloxymethyl-3-methyl-6-nonyl-3,6-dihydropyran-2-one   、                                                                                             
(3R,6S)-6-benzyloxymethyl-3-methyl-6-nonyl-3,6-dihydropyran-2-one