General Zinc-Catalyzed Conia-Ene Reactions of 1,3-Dicarbonyl Compounds with Alkynes Including the Classically Challenging Substrates under Neat Conditions
作者:Chen-Liang Deng、Ren-Jie Song、Yi-Lin Liu、Jin-Heng Li
DOI:10.1002/adsc.200900588
日期:2009.12
products has been developed by zinc-catalyzed intramolecular Conia-enereactions of 1,3-dicarbonylcompounds with alkynes. This new route allows a wide range of dicarbonyl compounds, including the classicallychallenging 1,3-diesters and N,N′-disubstituted 1,3-keto amides, to be used for the Conia-enereaction with inexpensive zinc chloride (ZnCl2) underneatconditions.
Facile and Versatile Room-Temperature Synthesis of N,N-Disubstituted Cyanoacetamides from Malonic Ester Chloride
作者:Andrzej Manikowski、Zofia Kolarska
DOI:10.1080/00397910902788216
日期:2009.9.18
Abstract A generalmethod for the synthesis of various N,N-disubstituted cyanoacetamides from readily available methyl malonyl chloride and secondary amines, including sterically demanding aliphatic and aromatic amines, is described.
Diels–Alder Reactions of α-Amido Acrylates with <i>N</i>-Cbz-1,2-dihydropyridine and Cyclopentadiene
作者:Hossay Abas、Christopher S. Frampton、Alan C. Spivey
DOI:10.1021/acs.joc.6b01684
日期:2016.10.21
Diels–Alder reactions of α-amido acrylates with N-Cbz-1,2-dihydropyridine and cyclopentadiene have been explored to investigate the factors influencing the endo/exo selectivity. For the dihydropyridine, steric factors allowed the diastereoselectivity to be modulated to favor either endo- or exo-ester adducts. For cyclopentadiene, the endo-ester adducts were favored regardless of steric perturbation, although
A novel method for a mild copper-catalyzed selective monoalkylation of activemethylenecompounds with various alkylsilyl peroxides has been developed. The reaction has a broad substrate scope and our mechanistic studies suggest the participation of radical species in this alkylation reaction.
strategy mediated by a hypervalentiodine(III) reagent for the functionalization of enol derivatives with different heteronucleophiles including carboxylic acids, thiols, alcohols, primary and secondary amines, azides and carbamates generated from CO2. Relevant examples for the derivatization of natural products and pharmaceutical compounds are also presented. The mechanism of the reaction was investigated
一个有用的策略:在此,我们报告了一种由高价碘 (III) 试剂介导的 umpolung 策略,用于用不同的异核亲核试剂(包括羧酸、硫醇、醇、伯胺和仲胺、叠氮化物和由 CO 2产生的氨基甲酸酯)对烯醇衍生物进行官能化。还介绍了天然产物和药物化合物衍生化的相关示例。通过DFT计算和实验研究研究了反应机理。