Metal-free photoinduced C(sp3)–H borylation of alkanes
作者:Chao Shu、Adam Noble、Varinder K. Aggarwal
DOI:10.1038/s41586-020-2831-6
日期:2020.10.29
precious-metal catalysts for C-H bond cleavage and, as a result, display high selectivity for borylation of aromatic C(sp2)-H bonds over aliphatic C(sp3)-H bonds4. Here we report a mechanistically distinct, metal-free borylation using hydrogen atom transfer catalysis5, in which homolytic cleavage of C(sp3)-H bonds produces alkylradicals that are borylated by direct reaction with a diboron reagent. The reaction
Iridium-catalysed borylation of sterically hindered C(sp<sup>3</sup>)–H bonds: remarkable rate acceleration by a catalytic amount of potassium tert-butoxide
The C(sp(3))-H bonds located on the methyl groups of an isopropyl group participate in iridium-catalysed C-H borylation with bis(pinacolato)diboron via a significant rate acceleration caused by a catalytic amount of t-BuOK.