Alkynylsilanes – a missing piece of different silylation agents, can serve as valuable substrates in the O‐silylation through a dealkynative coupling with alcohols or silanols. The described approach displays a whole array of advantages in terms of green chemistry and is a promising alternative to existing methodologies.
Multitasking silanes: Cobalt-catalyzed sp C−H silylation by a dehydrogenative coupling between silylacetylenes and hydrosilanes is reported. As a result, a variety of complex organosilicon derivatives was obtained. An inexpensive and easy-to-synthesize catalyst can be used due to the dual role of phenylsilane as substrate and activator.
Scalable synthesis of 5,11-diethynylated indeno[1,2-<i>b</i>]fluorene-6,12-diones and exploration of their solid state packing
作者:Bradley D Rose、Peter J Santa Maria、Aaron G Fix、Chris L Vonnegut、Lev N Zakharov、Sean R Parkin、Michael M Haley
DOI:10.3762/bjoc.10.219
日期:——
We report a new synthetic route to 5,11-disubstituted indeno[1,2-b]fluorene-6,12-diones that is amenable to larger scale reactions, allowing for the preparation of gram amounts of material. With this new methodology, we explored the effects on crystal packing morphology for the indeno[1,2-b]fluorene-6,12-diones by varying the substituents on the silylethynyl groups.
excited‐state. In this contribution, the nature of the heteroring constitutive of these rigidified HBX dyes was modified and we demonstrate that this simple structural modification triggers major optical changes in terms of emission color, dual emission engineering, and importantly, fluorescent quantum yield. Investigation of the photophysical properties in solution and in the solidstate of a series
the reaction is determined depending on the type of the substituent at the aromatic ring in triazine PN5P pincer ligands. Thus, our catalytic approach has been successfully applied to obtain both hydroboration and dehydrogenative coupling products. Finally, this versatile protocol implies the use of commercially available pinacolborane as a simultaneous substrate and (pre)catalyst’s activator. Moreover
在此,我们描述了由钴(预)催化剂催化的甲硅烷基乙炔与硼氢化物的功能化。反应方向取决于三嗪 PN 5 P 钳形配体中芳环上取代基的类型。因此,我们的催化方法已成功应用于获得硼氢化和脱氢偶联产物。最后,这种多功能协议意味着使用市售的频哪醇硼烷作为同时底物和(预)催化剂的活化剂。此外,所描述的程序导致了一组有趣的化合物,具有许多潜在的工业和合成应用。