Base (I), the structure of which had been considered to be that of O-methylpilocereine and O-methylpiloceredine, was synthesized from diphenyl ether dicarboxaldehyde (III). One of its racemic diastereomers was isolated in crystalline state. Both the crystalline base (I) and the mixture of its diastereomers had identical infrared spectra with O-methylisopilocereine in chloroform solution. The chromatographic behaviours also suggested that the formula (I) represents O-methylisopilocereine, not O-methylpilocereine.
碱(I)的结构被认为是 O-甲基
吡咯烷和 O-甲基
吡咯烷的结构,它是由
二苯醚二
甲醛(III)合成的。其中一种外消旋非对映异构体以结晶状态分离出来。晶体碱(I)及其非对映异构体混合物在
氯仿溶液中的红外光谱与 O-甲基异ilocereine 相同。色谱行为也表明,式 (I) 代表 O-甲基异ilocereine,而不是 O-甲基匹罗瑞林。