The stability of the common dispiroacetal moiety in pinnatoxins, the 1,7,9-trioxadispiro[5.1.5.2]pentadecane system, was investigated. The tricyclic keto acetal, of the natural form, was most favored among the possible isomers, however, its methylated form was not so preferential to be isomerized readily in the presence of acid. These stability results were supported by MM2 and AM1.
研究人员对
羽扇豆毒素中常见的二螺
缩醛分子,即 1,7,9-三氧二螺[5.1.5.2]
十五烷系统的稳定性进行了调查。在可能的异构体中,天然形式的
三环酮
缩醛最受欢迎,但其甲基化形式在酸的存在下并不那么容易异构化。这些稳定性结果得到了 MM2 和
AM1 的支持。