Direct synthesis of olefins continues to attract stellar attention due to the high importance of olefins. In this context, due to the wide availability of ketones, the synthesis of olefins directly from ketones provides a straightforward route. Considering this, olefins synthesis from ketones the formation of donor/donor type carbenes has been developed which leads to the efficient synthesis of versatile olefins by using a metal-free strategy. This approach features mild reaction conditions and exhibits a broad substrate scope when a biomass-derived solvent as a green reaction media is used. The practical utility of this approach has been demonstrated late-stage modifications and even by scaling up to 20 grams scale. At the end, mechanistic investigations and density functional theory studies clearly proved the formation of donor/donor carbenes, and examined the necessity of all the reagents and the effect of light in this system.

中文翻译：

---

无金属和可见光介导的方法能够从酮合成烯烃

由于烯烃的高度重要性，烯烃的直接合成继续引起人们的广泛关注。在这种情况下，由于酮的广泛可用性，直接从酮合成烯烃提供了一条简单的路线。考虑到这一点，已经开发了从酮合成烯烃，形成供体/供体型卡宾，从而通过使用无金属策略有效合成多功能烯烃。当使用生物质衍生溶剂作为绿色反应介质时，该方法具有温和的反应条件并表现出广泛的底物范围。这种方法的实用性已在后期修改中得到证实，甚至通过扩大到 20 克规模来证明。最后，机理研究和密度泛函理论研究清楚地证明了供体/供体卡宾的形成，并检验了所有试剂的必要性以及光在该系统中的作用。