2,2-dimethylpropionic acid (E)-(2S,3S,5S,6S,7R)-2,3-epoxy-7-hydroxy-5-(4-methoxybenzyloxy)-6-methyldeca-8-enyl ester                                                                                                                                                              在
                                                                                                                                                                                 camphor-10-sulfonic acid                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 4.0h,
                                                                                                                以90%的产率得到2,2-dimethylpropionic acid 2S-hydroxy-2-(E)-[4S-(4-methoxybenzyloxy)-5R-methyl-6R-propenyltetrahydropyran-2R-yl]ethyl ester