Ruthenium-Catalyzed Aminomethylation and Methylation of Phenol Derivatives Utilizing Methanol as the C<sub>1</sub>Source
作者:Seoksun Kim、Soon Hyeok Hong
DOI:10.1002/adsc.201601117
日期:2017.3.6
involving ortho‐aminomethylation of phenol was developed via ruthenium‐catalyzed dehydrogenation of methanol, an environmentally benign C1 building block, without the use of reactive reagents. The reaction was successfully applied to a range of substrates. When naphthol was employed instead of phenol, only methylation was observed. On the basis of various mechanistic studies, we propose that formamide barely
Structurally Well-Defined PC(sp<sup>3</sup>)P Osmium Pincer Catalysts for Methylation of Alcohols, Indoles, Phenols, and Sulfonamides Using Methanol as a C<sub>1</sub> Source
作者:Nandita Biswas、Dmitri Gelman
DOI:10.1021/acscatal.3c05062
日期:2024.2.2
Recent findings show pincer catalysts of osmium superior in a broad spectrum of synthetically valuable transformations. This article reports structurally well-defined Os(II)PCsp3P complexes stabilized by a functional dibenzobarrelene-based pincer ligand. We describe their organometallic and catalyticproperties in the hydride transfer reactions. We demonstrate that the osmium center, covalently locked
最近的研究结果表明,锇钳形催化剂在广泛的具有合成价值的转化中具有优越性。本文报道了结构明确的 Os(II)PC sp 3 P 配合物,该配合物由功能性二苯并环烯基钳配体稳定。我们描述了它们在氢化物转移反应中的有机金属和催化性能。我们证明,共价锁定在 3 维配体口袋内的锇中心表现出严格可预测的配位行为和氧化还原刚性,同时由于与邻近功能侧臂的潜在合作而保持催化活性。所描述的 Os(II)PC sp 3 P 配合物被发现在使用甲醇作为 C 1源的醇、吲哚、酚和磺酰胺的温和选择性甲基化中是优异的催化剂。