1402842-75-4Relevant academic research and scientific papers
Catalytic functionalization of unactivated sp3 C-H bonds via exo -directing groups: Synthesis of chemically differentiated 1,2-Diols
Ren, Zhi,Mo, Fanyang,Dong, Guangbin
, p. 16991 - 16994,4 (2020/09/02)
We describe a Pd-catalyzed site-selective functionalization of unactivated aliphatic C-H bonds, providing chemically differentiated 1,2-diols from monoalcohol derivatives. The oxime was employed as both a directing group (DG) and an alcohol surrogate for this transformation. As demonstrated in a range of substrates, the C-H bonds β to the oxime group are selectively oxidized. Besides activation of the methyl groups, methylene groups (CH2) in cyclic substrates and methine groups (CH) at bridge-head positions can also be functionalized. In addition, an intriguing oxidative skeleton rearrangement was observed using the menthol-derived substrate. The use of exo-directing groups in C-H activation, as illustrated in this work, would potentially open doors for the discovery of new transformations and new cleavable DGs.
