2-methyl-5-vinyl-pyrimidine   、                                                                                      
8-ethyl-2-methyl-5-(2-(2-methylpyrimidin-5-yl)ethyl)-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole   、                                                                                      
草酸                                                                                                                                                                                              以
                                                                                         
N-甲基吡咯烷酮                                                                                  为溶剂,
                                                                                                                                                    反应 3.5h,
                                                                                                                以75%的产率得到8-ethyl-2-methyl-5-(2-(2-methylpyrimidin-5-yl)ethyl)-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole  oxalate