(E)-4-(6-methoxy-1-oxo-tetralin-2-yl)but-2-enal   、                                                                                      
methyl 3-(benzylamino)but-2-enoate                                                                                                                                                              在
                                                                                                                                                                                 
methyl 1-benzyl-4-[(6-methoxy-1-oxo-tetralin-2-yl)methyl]-2-methyl-4H-pyridin-3-carboxylate   、                                                                                                  SiO2   、                                                                                                  Petroleum Ether EtOAc                                                                                                                                  作用下,
                                                                                                                                                                                                                            以afford the title compound 69 as a yellow oil的产率得到methyl 1-benzyl-4-[(6-methoxy-1-oxo-tetralin-2-yl)methyl]-2-methyl-4H-pyridin-3-carboxylate