allyl 9-methyl-4-oxo-2,3,4,9-tetrahydro-1H-carbazole-3-carboxylate   、                                                                                      alkaline earth salt of/the/ methylsulfuric acid                                                                                                                                                              在
                                                                                                                                                                                 sodium hydride                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃   、                                                                                         mineral oil                                                                                  为溶剂,
                                                                                                                                                    反应 2.33h,
                                                                                                                以87%的产率得到(rac)-allyl 3-(2-ethoxy-2-oxoethyl)-9-methyl-4-oxo-2,3,4,9-tetrahydro-1H-carbazole-3-carboxylate