Efficient metal-free photochemical borylation of aryl halides under batch and continuous-flow conditions
作者:Kai Chen、Shuai Zhang、Pei He、Pengfei Li
DOI:10.1039/c5sc04521e
日期:——
A rapid, chemoselective and metal-free C-B bond-forming reaction of aryl iodides and bromides in aqueous solution at low temperatures was discovered. This reaction is amenable to batch and continuous-flow conditions...
Transition-Metal-Free Borylation of Aryl Bromide Using a Simple Diboron Source
作者:Taeho Lim、Jeong Yup Ryoo、Min Su Han
DOI:10.1021/acs.joc.0c01065
日期:2020.8.21
reaction of aryl bromides. Bis-boronic acid (BBA), was used, and the borylation reaction was performed using a simple procedure at a mild temperature. Under mild conditions, aryl bromides were converted to arylboronic acids directly without any deprotection steps and purified by conversion to trifluoroborate salts. The functional group tolerance was considerably high. The mechanism study suggested that
Electrochemical Synthesis of Biaryls via Oxidative Intramolecular Coupling of Tetra(hetero)arylborates
作者:Arif Music、Andreas N. Baumann、Philipp Spieß、Allan Plantefol、Thomas C. Jagau、Dorian Didier
DOI:10.1021/jacs.9b12300
日期:2020.3.4
scope, scalability and robustness of this unconventional catalyst-free transformation, leading to functional-ized biaryls and ultimately furnishing drug-like small molecules as well as late stage derivatization of natural compounds. In addition, the observed selectivity of the oxidative coupling reaction is related to the electronic structure of the TABs through quantum-chemical calculations and experimental
(BXT) as an electrophile under room temperature conditions. The reaction tolerates a variety of electron-rich arenes and heteroarenes to afford the corresponding arylbenziodoxoles in moderate to good yields. The reaction can also be performed mechanochemically by grinding a mixture of solid arenes and BXT undersolvent-freeconditions. The arylbenziodoxoles can be used for various C–C and C–heteroatom
The present invention relates to compounds of formula I,
wherein R
1
to R
5
are defined in the description and claims, and to pharmaceutically acceptable salts thereof. The present invention relates also to the manufacture of said compounds, pharmaceutical compositions containing them and methods for the treatment and/or prophylaxis of diseases which can be treated with HDL-cholesterol raising agents, such as dyslipidemia, atherosclerosis and cardiovascular diseases.