Diazomethane ring expansion of tricyclo[4.1.0.01,3]heptan-4-one provides a convenient route to three carbon-bridged spiropentanes. The relative rates of reaction and the migratory preferences of cyclopropyl vs methylene were examined for several cyclopropyl alkyl ketones, and were correlated with the results of HF/6-31G∗ MO calculations.
三环[4.1.0.0 1,3 ]
庚烷-4-酮的
重氮甲烷环扩环提供了通往三个碳桥联螺
环戊烷的便捷途径。研究了几种环丙基烷基酮的相对反应速率以及环丙基与亚甲基的迁移偏好,并将其与HF / 6-31G * MO计算结果相关联。