The acyl group of an alpha-aryl-beta-keto ester was readily transferred to N-, O-, and S-nucleophiles. The transacylation from arylated diethyl 3-oxoglutarate to amines led to unsymmetrical malonic acid amide esters in high yields. The present reaction proceeded under mild conditions without formation of detectable byproducts. Only simple experimental manipulations were required. This reaction was also found to be sensitive to steric factors, which enabled the chemoselective monoacylation of diamines and amino alcohols without any modifications such as protection.
therefore, serve as C3N1 building blocks having a nitro group to afford nitropyridones and aminonitropyridines with a functional group at the 3-position. Upon treatment with malonic acid derivatives or β-keto esters, nitropyridones were obtained, whereas reactions with functionalized acetonitriles afford aminonitropyridines, via a formal transfer of an alkyl group from the ring nitrogen to the imino group
β-甲酰基-β-亚硝胺1同时具有亲电甲酰基和亲核氨基,因此,作为具有硝基的C 3 N 1结构单元,可以提供在3-位具有官能团的硝基吡啶酮和氨基硝基吡啶。经治疗丙二酸可以得到硝基吡啶酮衍生物或β-酮酯,而与官能化乙腈的反应则是通过烷基从环氮到亚氨基的正式转移而得到氨基硝基吡啶。这些程序提供了制备具有硝基的杂环的实用方法。
Carbene Radicals in Cobalt(II)-Porphyrin-Catalysed Carbene Carbonylation Reactions; A Catalytic Approach to Ketenes
作者:Nanda D. Paul、Andrei Chirila、Hongjian Lu、X. Peter Zhang、Bas de Bruin
DOI:10.1002/chem.201301731
日期:2013.9.23
One‐pot radicals: Cobalt(III)–carbene radicals, generated by metallo‐radical activation of diazo compounds and N‐tosylhydrazone sodium salts with cobalt(II) complexes of porphyrins, readily undergo radical addition to carbon monoxide, allowing the catalytic production of ketenes. These ketenes subsequently react with various amines, alcohols and imines in one‐pot tandem transformations to produce differently
Tunable Copper-Catalyzed Reaction of C<sub>60</sub> with 2-Ethoxycarbonylacetamides and Subsequent BF<sub>3</sub>·Et<sub>2</sub>O-Mediated Isomerization of the Generated Dihydrofuran-Fused Fullerenes to Fulleropyrrolidinones
作者:Qiaoqiao Teng、Yi-Chen Tan、Chun-Bao Miao、Xiao-Qiang Sun、Hai-Tao Yang
DOI:10.1021/acs.joc.8b02547
日期:2018.12.21
copper-catalyzed reaction of C60 with 2-ethoxycarbonylacetamides using air as the oxidant has been explored, which selectively affords methanofullerenes (2) and dihydrofuran-fused fullerenes (3) under the CuI/DMAP and CuCl/NMI catalytic systems, respectively. Furthermore, the generated dihydrofuran-fused fullerenes could be transformed to fulleropyrrolidinones (4 and 5) upon treatment with BF3·Et2O.
Process for the production of malonic acid derivative compounds
申请人:——
公开号:US04736056A1
公开(公告)日:1988-04-05
This invention relates to a process for preparing a malonic acid derivative compound of formula (i) depicted herein in high yield and high purity by reacting a malonic acid derivative compound of formula (ii) depicted herein with an alkylating agent of formula (iii) depicted herein in the presence of a solvent and a base.
Pd-Catalyzed Carbonylation of Diazo Compounds at Atmospheric Pressure: A Catalytic Approach to Ketenes
作者:Zhenhua Zhang、Yiyang Liu、Lin Ling、Yuxue Li、Yian Dong、Mingxing Gong、Xiaokun Zhao、Yan Zhang、Jianbo Wang
DOI:10.1021/ja107351d
日期:2011.3.30
and affects the diastereoselectivity of the β-lactam products by assisting isomerization of the addition intermediate. On the other hand, the acylketenes generatedfrom the Pd-catalyzed carbonylation of α-diazoketones react with imines in a formal [4 + 2] cycloaddition manner to afford 1,3-dioxin-4-one derivatives. This straightforward carbonylation provides a new approach toward highly efficient catalytic