Total synthesis and neuroprotective effect of O-methylmurrayamine A and 7-methoxymurrayacine
                                
                                    
                                        作者:Ying-Da Zang、Chuang-Jun Li、Xiu-Yun Song、Jie Ma、Jing-Zhi Yang、Nai-Hong Chen、Dong-Ming Zhang                                    
                                    
                                        DOI:10.1080/10286020.2017.1327952
                                    
                                    
                                        日期:2017.6.3
                                    
                                    O-Methylmurrayamine A (7) and 7-methoxymurrayacine (8) are natural products isolated from Murraya koenigii and Murraya siamensis, respectively. In this paper, we report the synthesis of 7 and 8 which are featured in the key step of cyclization to form carbazole intermediate 5 with mild conditions. The structures were confirmed by H-1 NMR, C-13 NMR, and HR-ESI-MS. In addition, compounds 7 and 8 were tested for their neuroprotective effects against H2O2 -induced PC12 cell damage. The results showed that compounds 7 and 8 have neuroprotective effect.