2-(1-azidovinyl)naphthalene   、                                                                                      
(2-((4-(((3R,8S,9S,10R,13R,14S,17R)-10,13-dimethyl-17-((R)-6-methylheptan-2-yl)-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl)oxy)phenyl)ethynyl)phenyl)methanol                                                                                                                                                              在
                                                                                                                                                                                 indium(III) triflate   、                                                                                                  
2,2,2-三氟乙醇   、                                                                                                  
六氟异丙醇                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                                                        以66%的产率得到6a-(4-(((3R,8S,9S,10R,13R,14S,17R)-10,13-dimethyl-17-((R)-6-methylheptan-2-yl)-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl)oxy)phenyl)-13-methyl-5,6a-dihydrobenzo[6,7]indeno[1,2-c]isochromene