叔丁基二甲硅基三氟甲磺酸酯   、                                                                                      
(3aR,4S,5aR,11R,11aS,11bS)-11-(2,4-Dinitro-phenylamino)-7-methoxy-2,2,4-trimethyl-3a,11,11a,11b-tetrahydro-4H,5aH-1,3,5-trioxa-cyclopenta[a]anthracen-6-one                                                                                                                                                              在
                                                                                                                                                                                 
三乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 4.0h,
                                                                                                                以95%的产率得到[(3aR,4S,11R,11aS,11bS)-6-(tert-Butyl-dimethyl-silanyloxy)-7-methoxy-2,2,4-trimethyl-3a,11,11a,11b-tetrahydro-4H-1,3,5-trioxa-cyclopenta[a]anthracen-11-yl]-(2,4-dinitro-phenyl)-amine