Pseudo-Solid-State Suzuki-Miyaura Reaction and the Role of Water Formed by Dehydration of Arylboronic Acids
作者:Evgeniy O. Pentsak、Valentine P. Ananikov
DOI:10.1002/ejoc.201900410
日期:2019.7.14
Conditions for a solid‐state Suzuki–Miyaura reaction were analyzed in details. The results confirm the key role of water, which is formed as a by‐product in the side reaction of arylboronic acid trimerization.
Visible-Light-Induced, Catalyst-Free Radical Arylations of Arenes and Heteroarenes with Aryldiazonium Salts
作者:Michael C. D. Fürst、Eva Gans、Michael J. Böck、Markus R. Heinrich
DOI:10.1002/chem.201703954
日期:2017.11.2
photocatalyst and other additives, the radical arylation of diverse arenes and heteroarenes has been achieved with aryldiazonium salts under visible‐light irradiation from a blue light‐emitting diode (LED). Although the course of some reactions can be rationalized by the formation of strongly light‐absorbing charge‐transfer (CT) complexes between the diazonium ion and the aromatic substrate, several
Thermal (Iodide) and Photoinduced Electron-Transfer Catalysis in Biaryl Synthesis <i>via</i> Aromatic Arylations with Diazonium Salts
作者:D. Kosynkin、T. M. Bockman、J. K. Kochi
DOI:10.1021/ja970599b
日期:1997.5.1
oxidant. The complex kinetics of such an electron-transfer chain or ETC process (Scheme 1) is quantitatively verified by computer simulation of the Ar‘H-dependent (a) competition between arylation vs iodination and (b) catalytic efficiency of iodide, using the GEAR algorithms. ETC catalysis also pertains to the alternative photochemical procedure for arylation (in the absence of iodide), in which the deliberate
Optical Control of CRAC Channels Using Photoswitchable Azopyrazoles
作者:Xingye Yang、Guolin Ma、Sisi Zheng、Xiaojun Qin、Xiang Li、Lupei Du、Youjun Wang、Yubin Zhou、Minyong Li
DOI:10.1021/jacs.0c02949
日期:2020.5.20
The Ca2+ release-activated Ca2+ (CRAC) channels control many Ca2+-modulated physiological processes in mammals. Hyperactivating CRAC channels are known to cause Stormorken syndrome. Here we show the design of azopyrazole-derived photoswitchable CRAC channel inhibitors (designated piCRACs), which enable optical inhibition of store-operated Ca2+ influx and downstream signaling. Moreover, piCRAC-1 has