N-Heterocyclic Carbene: An Efficient Catalyst for the Ring-Opening Reaction of Aziridine with Acid Anhydride

2006 ◽  
Vol 2006 (21) ◽  
pp. 4787-4790 ◽  
Author(s):  
Xiaoyu Sun ◽  
Shengqing Ye ◽  
Jie Wu
Keyword(s):  
Ring Opening ◽  
Acid Anhydride ◽  
Efficient Catalyst ◽  
Ring Opening Reaction

Tetranuclear Zn complex covalently immobilized on sulfopropylsilylated mesoporous silica: An efficient catalyst for ring opening reaction of epoxide with amine

2020 ◽  
Vol 497 ◽  
pp. 111220
Author(s):  
Divya Jadav ◽  
Pooja Shukla ◽  
Rajib Bandyopadhyay ◽  
Yoshihiro Kubota ◽  
Sourav Das ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Ring Opening ◽  
Efficient Catalyst ◽  
Ring Opening Reaction

scholarly journals Synthesis of Canthardin Sulfanilamides and Their Acid Anhydride Analogues via a Ring-Opening Reaction of Activated Aziridines and Their Associated Pharmacological Effects

Molecules ◽  
2016 ◽  
Vol 21 (1) ◽  
pp. 100 ◽  
Author(s):  
Ling-Ling Chiang ◽  
Ing-Jy Tseng ◽  
Pen-Yuan Lin ◽  
Shiow-Yunn Sheu ◽  
Ching-Tung Lin ◽  
...  
Keyword(s):  
Ring Opening ◽  
Acid Anhydride ◽  
Pharmacological Effects ◽  
Ring Opening Reaction

scholarly journals SSZ-13 supported Ir as an efficient catalyst for methylcyclopentane ring-opening reaction

2021 ◽  
pp. 106311
Author(s):  
Peng Shan ◽  
Panpan Niu ◽  
Huifang Zhang ◽  
Chuanhao Zhang ◽  
Ningyue Lu ◽  
...  
Keyword(s):  
Ring Opening ◽  
Efficient Catalyst ◽  
Ring Opening Reaction

On the Conrotatory Ring Opening of 3-Carbomethoxycyclobutene Vis-À-Vis 3-Carbomethoxy-1,2-Benzocyclobutene and the Predominant Inward Opening of 3-Dimethylaminocarbonyl-1,2-Benzocyclobutene

2018 ◽  
Author(s):  
Veejendra Yadav ◽  
Dasari L V K Prasad ◽  
Arpita Yadav ◽  
Maddali L N Rao
Keyword(s):  
Transition State ◽  
Ring Opening ◽  
Electron Process ◽  
Ring Opening Reaction ◽  
Stable Species ◽  
Electron Event

<p>The torquoselectivity of conrotatory ring opening of 3-carbomethoxycyclobutene is controlled by p<sub>C1C2</sub>→s*<sub>C3C4</sub> and s<sub>C3C4</sub>→p*<sub>CO</sub> interactions in the transition state in a 4-electron process as opposed to only s<sub>C3C4</sub>→p*<sub>CO</sub> interaction in an apparently 8-electron event in 3-carbomethoxy-1,2-benzocyclobutene. The ring opening of 3-carbomethoxy-1,2-benzocyclobutene is sufficiently endothermic. We therefore argue that the reverse ring closing reaction is faster than the forward ring opening reaction and, thus, it establishes an equilibrium between the two and subsequently allows formation of the more stable species <i>via</i> outward ring opening reaction. Application of this argument to 3-dimethylaminocarbonyl-1,2-benzocyclobutene explains the predominantly observed inward opening.</p>

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