在20°C下,以光度法测定了带有α-氯和α-溴取代基(1a-e)的芳基磺酰基取代的碳负离子与醌甲基化物2a-g和亚苄基丙二酸酯2h和2i的反应速率。反应在拟一级反应条件下进行,并获得二级速率常数作为拟一级反应速率常数对过量使用的反应物浓度的曲线的斜率。根据线性自由能关系log k 2(20°C)= s N,二阶速率常数与参考亲电体的参数E线性相关(Ñ + ë),这使我们能够获得所述亲核体的具体参数Ñ和š Ñ碳负离子的1A-E 。由此产生的亲核参数N(23 < N <29)表明,该标题化合物是迄今为止反应最强的亲核试剂,已综合到我们全面的亲核试剂规模中。
Base-Promoted Cascade Reactions for the Synthesis of 3,3-Dialkylated Isoindolin-1-ones and 3-Methyleneisoindolin-1-ones
作者:Antonio Macchia、Francesco F. Summa、Antonia Di Mola、Consiglia Tedesco、Giovanni Pierri、Armin R. Ofial、Guglielmo Monaco、Antonio Massa
DOI:10.1021/acs.joc.1c01794
日期:2021.11.5
Cascade reactions of ortho-carbonyl-substituted benzonitriles with ((chloromethyl)sulfonyl)benzenes as pronucleophiles led to new isoindolin-1-ones with a tetrasubstituted C-3 position or to (Z)-3-(sulfonyl-methylene)isoindolin-1-ones. The reactions start from readily available materials, are carried out under mild conditions, and do not require metal catalysis. Promoted only by the cheap and environmentally
邻-羰基取代的苄腈与 ((氯甲基)磺酰基) 苯作为亲核试剂的级联反应产生具有四取代 C-3 位的新异吲哚啉-1-或 ( Z )-3-(磺酰基-亚甲基)异吲哚啉-1 -那些。反应从容易获得的材料开始,在温和的条件下进行,不需要金属催化。仅以廉价且环保的 K 2 CO 3为基础,最多可以在一个锅中组合六个元素步骤。因此,连续的一锅级联/β-消除/烷基化为马兜铃内酰胺天然产物的合成提供了有用的中间体。通过 DFT 研究研究了观察到的选择性和机制。
[EN] O-HYDROXY- AND O-AMINO BENZAMIDE DERIVATIVES AS IKK2 INHIBITORS<br/>[FR] DÉRIVÉS O-HYDROXY- ET O-AMINO BENZAMIDE COMME INHIBITEURS IKK2
申请人:SMITHKLINE BEECHAM CORP
公开号:WO2007025575A1
公开(公告)日:2007-03-08
[EN] A compound of Formula (I). [FR] La présente invention concerne un composé de formule (I).
Nucleophilicity Parameters of Arylsulfonyl-Substituted Halomethyl Anions
作者:Zhen Li、Quan Chen、Peter Mayer、Herbert Mayr
DOI:10.1021/acs.joc.6b02844
日期:2017.2.17
pseudo-first-order rateconstants versus the concentrations of the reactants used in excess. The second-orderrateconstants correlate linearly with the parameters E of the reference electrophiles according to the linear free energy relationship log k2(20 °C) = sN(N + E), which allowed us to derive the nucleophile-specific parameters N and sN of carbanions 1a–e. The resulting nucleophilicity parameters N (23 < N < 29)
在20°C下,以光度法测定了带有α-氯和α-溴取代基(1a-e)的芳基磺酰基取代的碳负离子与醌甲基化物2a-g和亚苄基丙二酸酯2h和2i的反应速率。反应在拟一级反应条件下进行,并获得二级速率常数作为拟一级反应速率常数对过量使用的反应物浓度的曲线的斜率。根据线性自由能关系log k 2(20°C)= s N,二阶速率常数与参考亲电体的参数E线性相关(Ñ + ë),这使我们能够获得所述亲核体的具体参数Ñ和š Ñ碳负离子的1A-E 。由此产生的亲核参数N(23 < N <29)表明,该标题化合物是迄今为止反应最强的亲核试剂,已综合到我们全面的亲核试剂规模中。
Kinetics and Mechanism of Oxirane Formation by Darzens Condensation of Ketones: Quantification of the Electrophilicities of Ketones
作者:Zhen Li、Harish Jangra、Quan Chen、Peter Mayer、Armin R. Ofial、Hendrik Zipse、Herbert Mayr
DOI:10.1021/jacs.8b01657
日期:2018.4.25
The kinetics of epoxide formation by Darzens condensation of aliphatic ketones 1 with arylsulfonyl-substituted chloromethyl anions 2 (ArSO2CHCl-) have been determined photometrically in DMSO solution at 20 °C. The reactions proceed via nucleophilic attack of the carbanions at the carbonyl group to give intermediate halohydrin anions 4, which subsequently cyclize with formation of the oxiranes 3. Protonation