4-((2R,5S)-5-tert-Butyl-tetrahydro-pyran-2-yl)-2-methyl-but-3-yn-2-ol                                                                                                                                                              在
                                                                                                                                                                                 camphor-10-sulfonic acid   、                                                                                                  
potassium tert-butylate   、                                                                                                  
叔丁基锂                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 (5R*,7R*)-7-tert-Butyl-2,2-dimethyl-1,6-dioxaspiro<4.5>dec-3-ene   、                                                                                             (5R,8S)-8-tert-Butyl-2,2-dimethyl-1,6-dioxa-spiro[4.5]dec-3-ene