作者:Yoshihiro Kubota、Hisashi Kawasaki、Kiyoshi Tomioka、Kenji Koga                                    
                                    
                                        DOI:10.1016/s0040-4020(01)89890-2
                                    
                                    
                                        日期:1993.4
                                    
                                    Optically active and racemic azaisopicrostegane (3), azapicrostegane (4), and all of four stereoisomers of racemic azaisopicrosteganols and azapicrosteganols (5, 6, 8, 9) were successfully synthesized hy oxidative coupling of dibenzylurethanes (12, 18, 19).