scholarly journals Bile Acids and Steroids. XV. Thiosteroids. (4). Ring-opening Reaction of 11β, 12β-Episulfide with Acetic Anhydride and p-Toluenesulfonic Acid.

1960 ◽  
Vol 8 (8) ◽  
pp. 668-671 ◽  
Author(s):  
Taichiro Komeno
Keyword(s):  
Acetic Anhydride ◽  
Bile Acids ◽  
Ring Opening ◽  
Toluenesulfonic Acid ◽  
Ring Opening Reaction

Unexpected Ring-Opening Reaction of Aziridine with Acetic Anhydride in DMF.

ChemInform ◽  
2007 ◽  
Vol 38 (40) ◽  
Author(s):  
Tianning Diao ◽  
Xiaoyu Sun ◽  
Renhua Fan ◽  
Jie Wu
Keyword(s):  
Acetic Anhydride ◽  
Ring Opening ◽  
Ring Opening Reaction

Covalent modification of graphite oxide with acetic anhydride to enhance dispersibility in organic solvents

2016 ◽  
Vol 09 (03) ◽  
pp. 1650044 ◽  
Author(s):  
Jingjing Li ◽  
Anwei Yang ◽  
Chen Zhang ◽  
Lei Zhang ◽  
Feifei Sun ◽  
...  
Keyword(s):  
Acetic Anhydride ◽  
Organic Solvents ◽  
Mild Condition ◽  
Graphite Oxide ◽  
Ring Opening ◽  
Covalent Modification ◽  
Alkyl Aryl ◽  
Aryl Chlorides ◽  
Ring Opening Reaction ◽  
Epoxy Groups

Graphite oxide (GO) was modified by acetic anhydride via a catalyzed ring-opening reaction of the attached epoxy groups at very mild condition. The dispersion of the modified GO is thus largely imporved in many organic solvents and the highest GO concentration reaches 2.0[Formula: see text]mg/mL in alkyl(aryl) chlorides, ethers, alcohols and cyclohexane, which is amongst the highest value for GO in organics.

Unexpected Ring-opening Reaction of Aziridine with Acetic Anhydride in DMF

2007 ◽  
Vol 36 (5) ◽  
pp. 604-605 ◽  
Author(s):  
Tianning Diao ◽  
Xiaoyu Sun ◽  
Renhua Fan ◽  
Jie Wu
Keyword(s):  
Acetic Anhydride ◽  
Ring Opening ◽  
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>

Sign in / Sign up

Export Citation Format

Share Document