The selective ring-opening reaction of fluoroalkylidene-oxetanes was directed by the presence of the fluorine atom, enabling a two-step access to tetrasubstituted fluoroalkenes with excellent geometry control. Despite its small van der Waals radii electronic, rather than steric influences of the fluorine atom governed the ring-opening reaction with bromide ions, even in the presence of bulky substituents.

中文翻译：

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通过氟定向的氧杂环丁烷开环反应选择性制备四取代的氟烯烃。

氟代亚烷基-氧杂环丁烷的选择性开环反应是通过氟原子的存在来进行的，从而使两步接触四取代的氟代烯烃具有极好的几何形状控制。尽管其范德华半径电子较小，即使存在大的取代基，氟原子的空间影响也并非由空间影响，而是由溴离子控制。