(E)-4-(4-hepten-1-yl)quinol-2(1H)-one                                                                                                                                                              在
                                                                                                                                                                                 (1R,5R,7S)-7-(oxazolo[4,5-b]-thioxanthone-2-yl)-1,5,7-trimethyl-3-azabicyclo[3.3.1]nonan-2-one                                                                                                                                  作用下,
                                                                                                                                                                                        反应 1.0h,
                                                                                                                以58%的产率得到(3aR,4S,4aR,10bS)-4-ethyl-1,2,3,3a,4,4a-hexahydrocyclopenta[2,3]cyclobuta[1,2-c]quinol-5(6H)-one