system was found to promote the Csp2–N bond-forming reaction utilizing N-tosylhydrazones and N-H azoles. This process shows functional group tolerance; di-, tri-, and tetrasubstituted N-vinylazoles were obtained in high yields. Under the optimized conditions, the reaction proceeds with high stereoselectivity depending on the nature of the coupling partners.
Pd-catalyzed cross-coupling reactions of less activated alkenyl electrophiles (for tosylates and mesylates) with tosylhydrazones: synthesis of various 1,3-dienes
作者:Poojan K. Patel、Jignesh P. Dalvadi、Kishor H. Chikhalia
DOI:10.1039/c4ra09012h
日期:——
Palladium catalyzed cross coupling reaction engaging N-tosylhydrazones of corresponding ketones as a nucleophilic coupling partner and various alkenyl tosylates and mesylates as an electrophiles for the synthesis of various alkenyl derivatives. The salient features of this reactions are (1) no stoichiometric organometallic reagents required, (2) it tolerates a wide range of functional groups, (3) easy
Graphene macro-assembly-fullerene composite for electrical energy storage
申请人:LAWRENCE LIVERMORE NATIONAL SECURITY, LLC
公开号:US09870871B1
公开(公告)日:2018-01-16
Disclosed here is a method for producing a graphene macro-assembly (GMA)-fullerene composite, comprising providing a GMA comprising a three-dimensional network of graphene sheets crosslinked by covalent carbon bonds, and incorporating at least 20 wt. % of at least one fullerene compound into the GMA based on the initial weight of the GMA to obtain a GMA-fullerene composite. Also described are a GMA-fullerene composite produced, an electrode comprising the GMA-fullerene composite, and a supercapacitor comprising the electrode and optionally an organic or ionic liquid electrolyte in contact with the electrode.
Synthesis of Diarylmethanes via Metal-Free Reductive Cross-Coupling of Diarylborinic Acids with Tosyl Hydrazones
作者:Xijing Li、Yuanyuan Feng、Lin Lin、Gang Zou
DOI:10.1021/jo302207b
日期:2012.12.7
that takes advantage of diarylborinic acids as a cost-effective alternative to arylboronicacids for synthesis of diarylmethanes through metal-free reductive cross-coupling with N-tosylhydrazones of aromatic aldehydes and ketones. The procedure tolerates hydroxyl, halide, amine, and allyl functionality, complementary to the transition-metal catalyzed cross-coupling techniques.
Polycyclic Pyrazoles from Alkynyl Cyclohexadienones and Nonstabilized Diazoalkanes via [3 + 2]-Cycloaddition/[1,5]-Sigmatropic Rearrangement/Aza-Michael Reaction Cascade
center substituted” polycyclic pyrazoles from alkynyl cyclohexa-2,5-dienones and nonstabilized diazoalkanes via sequential [3 + 2]-cycloaddition/[1,5]-sigmatropic rearrangement and aza-Michael reactions is reported. The developed process is highly regioselective and stereoselective. It employs a wide substrate scope to furnish structurally diverse linear and bridged [4.4.n.0] ring-fused pyrazoles in moderate
一种通过连续[3 + 2]-环加成/[1,5]-σ重排和氮杂-迈克尔反应从炔基环己-2,5-二烯酮和不稳定重氮烷立体选择性合成“全中心取代”多环吡唑的有效方法被报道。所开发的过程具有高度区域选择性和立体选择性。它采用广泛的基材范围来提供结构多样的线性和桥接[4.4。 n .0]稠环吡唑,产率中等至良好。还展示了一锅法和克级合成以及合成转化。