名称:
                                A Convenient Preparation of 8-Ethyl-4,9-dihydro-3H-pyrano[3,4-b]indole-1-one, Key Intermediate of the Antiinflammatory Agent Etodolac
                             
                            
                                摘要:
                                A facile synthesis of 8-ethyl-4,9-dihydro-3H-pyrano [3,4-b]indole-1-one 5 is described which features the condensation of hydrazines with 2-oxo-5-hydroxypentanoic acid, followed by Fischer cyclization of these adducts.
                             
                                                            
                                    DOI:
                                    10.1080/00397919108020835