Rhodium(<scp>iii</scp>)-catalyzed C–H activation/[4+3] annulation of N-phenoxyacetamides and α,β-unsaturated aldehydes: an efficient route to 1,2-oxazepines at room temperature
cobalt(III)-catalyzed, redox-neutral, intermolecular carboamination of propiolates and bicyclic alkenes was developed. This non-annulative coupling strategy features atom economy, high regioselectivity, good yields, and functional groups tolerance. Such a carboamination reaction was applied to modified phenolsfrom the corresponding phenols under mild conditions.
Dual Directing-Groups-Assisted Redox-Neutral Annulation and Ring Opening of <i>N</i>-Aryloxyacetamides with 1-Alkynylcyclobutanols via Rhodium(III)-Catalyzed C–H/C–C Activations
A cascade [3 + 2] annulation and ringopening of N-aryloxyacetamides with 1-alkynylcyclobutanols via Rh(III)-catalyzed redox-neutral C–H/C–C activations using internal oxidative O–NHAc and −OH as the dual directing groups has been achieved. This reaction provided an efficient and regioselective approach to benzofuran derivatives with good functional group compatibility and high yields.
diazo compounds via a Rh(III)-catalyzed C-H activation, and the resulting Rh(III) intermediate subsequently undergoes an intramolecular oxidative addition into the O-N bond to form a Rh(V) nitrenoid species that is protonated and further directed toward electrophilic addition to the second ortho position of the phenyl ring. This work might provide a new direction for unsymmetrical C-H difunctionalization
Acylation of Csp<sup>2</sup>–H bond with acyl sources derived from alkynes: Rh–Cu bimetallic catalyzed CC bond cleavage
作者:Ying Xie
DOI:10.1039/c6cc05769a
日期:——
A novel Rh-Cu bimetallic catalyzed C[identical with]C bond cleavage as the acyl surrogates for the Csp2-H bonds acylation has been described. This transformation provides a concise way to synthesize orth-Acylphenols using...