The generation of larger rings from intermediate cyclobutanes via a two-step [2+ 2] photocycloaddition-ring expansion, known as the de Mayo reaction, has been widely applied in synthesis. Herein a one-step synthesis of cyclopentanoids has been developed based on the photochemical irradiation of an enone in the presence of an allylsilane. The ability of the silyl moiety to stabilize the intermediate biradical is believed to be ...
![6-[dimethyl(phenyl)silyl]hex-4-yn-1-ol Structure](https://image.chemsrc.com/caspic/111/922502-65-6.png)