To expand the toolbox for the synthesis of ortho-phenolic sulfilimines, sigmatropic rearrangements were introduced to the field of sulfiliminechemistry. Herein we report a N-H sulfenylation/[2,3]-sigmatropic rearrangement cascade reaction. This mild reaction enables commercially available thiols to serve as the sulfenylation reagent and generates water as the sole byproduct. Moreover, the reaction
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
Rhodium-catalyzed C–H bond functionalization led to a [4+3] annulation strategy to access 1,2-oxazepine rings.
铑催化的C-H键官能化引发了一种[4+3]环化策略,以获得1,2-噁唑环。
Fluorous Tagged <i>N</i>-Hydroxy Phthalimide for the Parallel Synthesis of <i>O</i>-Aryloxyamines
作者:Florence S. Gaucher-Wieczorek、Ludovic T. Maillard、Bernard Badet、Philippe Durand
DOI:10.1021/cc100098v
日期:2010.9.13
The parallel synthesis of O-aryloxyamines remains an unfulfilled need in the field of medicinal chemistry and fragment-based approaches. To fill this gap a solution-phase two-step process based on (1) a copper-catalyzed cross-coupling of aryl boronic acids with a fluorous tagged N-hydroxyphthalimide, and (2) a supported aminolysis was designed and optimized using Taguchi’s method. A library of O-aryloxyamines
Herein, a cascade [3 + 2] annulation of N-aryloxyacetamides with 3-(hetero)arylpropiolic acids affording benzofuran-2(3H)-ones via rhodium(iii)-catalyzed redox-neutral C-H functionalization/isomerization/lactonization using an internal oxidative directing group O-NHAc was achieved. This catalytic system provides a regio- and stereoselective approach to synthesize (Z)-3-(amino(aryl)methylene)benzofuran-2(3H)-ones
Rhodium(III)-Catalyzed<i>ortho</i>-Heteroarylation of Phenols through Internal Oxidative CH Activation: Rapid Screening of Single-Molecular White-Light-Emitting Materials
作者:Bijin Li、Jingbo Lan、Di Wu、Jingsong You
DOI:10.1002/anie.201507272
日期:2015.11.16
Reported herein is the first example of a transition‐metal‐catalyzed internaloxidativeCH/CH cross‐coupling between two (hetero)arenes through a traceless oxidation directing strategy. Without the requirement of an external metal oxidant, a wide range of phenols, including phenol‐containing natural products, can undergo the coupling with azoles to assemble a large library of highly functionalized