马来酸酐   、                                                                                      
tetramethyl 2a,3-dihydro-3,5a-methano-5aH-cyclobutanaphthalene-1,2,4,5-tetracarboxylate-2a,10,10-d3                                                                                                                                                                                              以
                                                                                         xylene                                                                                  为溶剂,
                                                                                                                                                    反应 7.0h,
                                                                                                                以50%的产率得到rac-tetramethyl (2aR,3S,5aS,6R,6aR,9aS,10S,10aR)-7,9-dioxo-2a,3,6a,7,9a,10-hexahydro-6H,9H-6,10-etheno-3,5a-methanocyclobuta[4a,5]naphtho[2,3-c]furan-1,2,4,5-tetracarboxylate-2a,13,13-d3