Synthesis of Bis(2,4-diarylimidazol-5-yl) Diselenides from N-Benzylbenzimidoyl Isoselenocyanates
摘要:
The reaction of N-benzylbenzamides 6 with SOCl2 under reflux gave the corresponding N-benzylbenzimidoyl chlorides 7. Further treatment with KSeCN in dry acetone yielded imidoyl isosclenocyanates 3 (Scheme 2). These compounds, obtained in satisfying yields, proved to be stable enough to be purified and analyzed. Reaction of 3 with morpholine in dry acetone led to the corresponding selonourea derivatives 8. On treatment with Et3N, the 4-nitrobenzyl derivatives of type 3 were transformed into bis(2,4-diarylimidazol-5-yl) diselenides 9 (Scheme 3). This transformation takes place only when the benzyl residue bears an NO2 group and the phenyl group is not substituted with a strong electron-donating group. A reaction mechanism for the formation of 9 is proposed in Scheme 4. The key structures have been established by X-ray crystallography.
Visible light-promoted self-coupling of N-chloramines at room temperature: A metal-free access to substituted amides
摘要:
An efficient protocol to synthesize substituted amides via self-coupling of N-chlorobenzylamines has been developed under visible light-promoted mild condition. Both the electron-deficient and electron-rich benzylamines undergo self-coupling very readily to produce the amide linkage under given reaction conditions.
Nafion®-catalyzed microwave-assisted Ritter reaction: an atom-economic solvent-free synthesis of amides
作者:Vivek Polshettiwar、Rajender S. Varma
DOI:10.1016/j.tetlet.2008.02.009
日期:2008.4
An atom-economic solvent-free synthesis of amides by the Ritter reaction of alcohols and nitriles under microwaveirradiation is reported. This green protocol is catalyzed by solid-supported Nafion®NR50 with improved efficiency and reduced waste production.
The invention concerns a method for treating depression or senile dementia using a compound which acts selectively as an agohist of gamma aminobutyric acid (GABA) at GABA autoreceptors with the proviso that the compound is not fengabine and progabide.
Design and Synthesis of Arylamidine Derivatives as Serotonin/Norepinephrine Dual Reuptake Inhibitors
作者:Hui Wen、Wen Qin、Guangzhong Yang、Yanshen Guo
DOI:10.3390/molecules24030497
日期:——
To improve the in vivo antidepressantactivity of previously reported serotonin (5-HT) and norepinephrine (NE) dual reuptake inhibitors, three series of arylamidine derivatives were designed and synthesized. The in vitro 5-HT and NE reuptake inhibitory activities of these compounds were evaluated, and compound II-5 was identified as the most potent 5-HT (IC50 = 620 nM) and NE (IC50 = 10 nM) dual reuptake
Deoxygenative Nucleophilic Phosphonation and Electrophilic Alkylation of Secondary Amides: A Facile Access to Quaternary α-Aminophosphonates
作者:Jiaxiang Lu、Zhenghua Li、Li Deng
DOI:10.1021/jacs.3c14517
日期:2024.2.21
synthetic accessibility of amides render them valuable precursors for the synthesis of diverse nitrogen-containing compounds. Herein, we present a metal-free and streamlined synthetic strategy for the synthesis of quaternary α-aminophosphonates. This approach involves sequential deoxygenative nucleophilic phosphonation and versatile electrophilic alkylation of secondaryamides in a one-pot fashion. Notably
The invention concerns a method for treating depression or senile dementia using a compound which acts selectively as an agonist of gamma aminobutyric acid (GABA) at GABA autoreceptors with the proviso that the compound is not fengabine and progabide.