We report here an efficient, mild and biomolecule-compatible method for constructing C–S bonds.
我们在这里报告了一种高效、温和且生物分子兼容的构建C-S键的方法。
Sc(OTf)<sub>3</sub>-Catalyzed Transfer Diazenylation of 1,3-Dicarbonyls with Triazenes via N–N Bond Cleavage
作者:Cong Liu、Jian Lv、Sanzhong Luo、Jin-Pei Cheng
DOI:10.1021/ol5027014
日期:2014.10.17
A new and efficient method for diazenylation reactions was developed with a Sc(OTf)(3)-catalyzed nitrogen-nitrogen bond cleavage process with triazenes. The transfer diazenylation reactions accommodate a diverse range of active methylene substrates including simple ketones to give aliphatic azo compounds that are of significant potential as azo prodrugs in high yields under mild conditions.
Synthesis of Aryl Trimethylstannane via BF<sub>3</sub>·OEt<sub>2</sub>-Mediated Cross-Coupling of Hexaalkyl Distannane Reagent with Aryl Triazene at Room Temperature
BF3·OEt2-mediated cross-coupling of (SnMe3)2 with aryl triazene offers a new strategy for the synthesis of aryl stannane. A variety of synthetically useful aryl trimethylstannanes were produced in moderate to good yields with this metal-free approach. One-pot sequential Stille cross-coupling with different aryl bromides provides a short entry to both symmetrical and unsymmetrical biaryl compounds.
作者:Gregor Kiefer、Tina Riedel、Paul J. Dyson、Rosario Scopelliti、Kay Severin
DOI:10.1002/anie.201408597
日期:2015.1.2
drugs. Here, we describe a new method for the synthesis of triazenes. The procedure involves a reagent which is rarely used in synthetic organic chemistry: nitrousoxide (N2O, “laughing gas”). Nitrousoxide mediates the coupling of lithium amides and organomagnesium compounds while serving as a nitrogen donor. Despite the very inert character of nitrousoxide, the reactions can be performed in solution