[EN] PROCESS FOR THE BORYLATION OF ARENES AND HETEROARYLS<br/>[FR] PROCÉDÉ DE BORYLATION D'ARÈNES ET D'HÉTÉROARYLES
申请人:UNIV MANCHESTER
公开号:WO2012025760A1
公开(公告)日:2012-03-01
This invention relates to a novel process for the borylation of arenes and heteroaryls. The present invention also provides novel borenium cations, which act as electrophiles for electrophilic substitution on the arene or heteroaryl ring, as well as to methodology for the preparation of these cations.
Simple inexpensive boron electrophiles for direct arene borylation
作者:Alessandro Del Grosso、Matthew D. Helm、Sophia A. Solomon、Dolores Caras-Quintero、Michael J. Ingleson
DOI:10.1039/c1cc14226g
日期:——
Electrophilic direct borylation is facilitated, and arene substrate scope enhanced, by using electrophiles derived from inexpensive reagents; specifically an amine, BCl3 and AlCl3.
Alkoxy highly edge-decorated polycylic aromatic hydrocarbons (PAHs) have been formed. Oxidative cross coupling of phenols constructs frameworks without any need for the prefunctionalization required by conventional methods. Moreover, smaller optical gaps can be achieved relative to systems of similar size.
Mechanistic Studies into Amine-Mediated Electrophilic Arene Borylation and Its Application in MIDA Boronate Synthesis
作者:Viktor Bagutski、Alessandro Del Grosso、Josue Ayuso Carrillo、Ian A. Cade、Matthew D. Helm、James R. Lawson、Paul J. Singleton、Sophia A. Solomon、Tommaso Marcelli、Michael J. Ingleson
DOI:10.1021/ja3100963
日期:2013.1.9
computational study, the borylation of activated arenes at 20 °C proceeds through an S(E)Ar mechanism with borenium cations, [Y(2)B(amine)](+), the key electrophiles. For catecholato-borocations, two amine dependent reaction pathways were identified: (i) With [CatB(NEt(3))](+), an additional base is necessary to accomplish rapid borylation by deprotonation of the borylated arenium cation (σ complex), which otherwise
potentials values of the carbazole and 1,8-naphthalimide derivatives range from 5.46 eV to 5.76 eV and the electron affinities values range from −3.04 eV to −2.92 eV. Dilute solutions of the 3- and 3,6-naphthalimide-substituted derivatives of carbazole in polar solvents were found to emit in the green region with quantum yields ranging from 0.66 to 0.83, while in the solid state fluorescence quantum yields