A facile access to 1-substituted and unsubstituted 3-isoquinolinones <i>via</i> Mannich or Sn2 initiated cascade reactions under catalyst-free conditions
作者:Lorenzo Serusi、Antonia Di Mola、Antonio Massa
DOI:10.1039/d3ra00378g
日期:——
Herein we report new cascade processes for the easy access to 1-substituted and C-unsubstituted 3-isoquinolinones. The Mannich initiated cascade reaction led to the synthesis of novel 1-substituted 3-isoquinolinones under catalyst-free conditions in the presence of nitromethane and dimethylmalonate as nucleophiles without the use of any solvent. The optimization of the synthesis of the starting material
Lactone Enolates of Isochroman-3-ones and 2-Coumaranones: Quantification of Their Nucleophilicity in DMSO and Conjugate Additions to Chalcones
作者:Mohammad Sadeq Mousavi、Antonia Di Mola、Giovanni Pierri、Consiglia Tedesco、Magenta J. Hensinger、Aijia Sun、Yilan Wang、Peter Mayer、Armin R. Ofial、Antonio Massa
DOI:10.1021/acs.joc.4c00277
日期:2024.5.17
Owing to stereoelectronic effects, lactones often deviate in reactivity from their open-chain ester analogues as demonstrated by the CH acidity (in DMSO) of 3-isochromanone (pKa = 18.8) and 2-coumaranone (pKa = 13.5), which is higher than that of ethyl phenylacetate (pKa = 22.6). We have now characterized the reactivity of the lactone enolates derived from 3-isochromanone and 2-coumaranone by following
由于立体电子效应,内酯的反应性通常与其开链酯类似物不同,如 3-异色满酮 (p Ka = 18.8) 和 2-香豆酮 (p Ka = 13.5 )的 CH 酸度(在 DMSO 中)所证明的那样,高于苯乙酸乙酯 (p K a = 22.6)。现在,我们通过跟踪 3-异苯并二氢吡喃酮和 2-香豆酮衍生的内酯烯醇化物与对醌甲基化物和亚芳基丙二酸酯(参考亲电子试剂)在 20 °C 下在 DMSO 中的迈克尔反应动力学,表征了它们的反应性。通过 Mayr-Patz 方程 lg k 2 = s N ( N + E ) 对实验确定的二阶速率常数k 2进行评估,提供了内酯烯醇化物的亲核性参数N (和s N )。通过将它们在迈尔亲核性尺度上的位置定位,它们的亲电反应伙伴的范围变得可预测,并且我们展示了一种新的催化方法,用于在甲苯中的相转移条件下内酯烯醇化物与查尔酮的一系列碳-碳键形成反应。
New Heterocyclic Derivatives Useful For The Treatment of CNS Disorders
申请人:Kenda Benoit
公开号:US20100222326A1
公开(公告)日:2010-09-02
The present invention relates to new compounds, processes for preparing them, pharmaceutical compositions containing them and their use as pharmaceuticals.