Ir-Catalyzed ring-opening of oxa(aza)benzonorbornadienes with water or alcohols

2019 ◽  
Vol 6 (8) ◽  
pp. 1151-1156 ◽  
Author(s):  
Xin Yang ◽  
Wen Yang ◽  
Yongqi Yao ◽  
Yingying Deng ◽  
Dingqiao Yang
Keyword(s):  
Ring Opening ◽  
Highly Efficient ◽  
Ring Opening Reaction

A highly efficient Ir-catalyzed ring-opening reaction of oxa(aza)benzonorbornadienes with water was firstly developed, which afforded a mild access to substituted dihydronaphthalene products with excellent yields (up to 99%) within 30 min.

Au(iii)-catalyzed ring opening reaction of 1-cyclopropyl-2-yn-1-ols with nucleophiles: highly efficient approach to (Z)-conjugated enynes

2007 ◽  
Vol 31 (12) ◽  
pp. 2041 ◽  
Author(s):  
Hui-quan Xiao ◽  
Xing-zhong Shu ◽  
Ke-gong Ji ◽  
Chen-ze Qi ◽  
Yong-min Liang
Keyword(s):  
Ring Opening ◽  
Efficient Approach ◽  
Highly Efficient ◽  
Ring Opening Reaction ◽  
Conjugated Enynes

scholarly journals Preparation of a highly efficient Pt/USY catalyst for hydrogenation and selective ring-opening reaction of tetralin

2018 ◽  
Vol 15 (3) ◽  
pp. 605-612 ◽  
Author(s):  
Qi Wang ◽  
Zhang-Gui Hou ◽  
Bo Zhang ◽  
Jian Liu ◽  
Wei-Yu Song ◽  
...  
Keyword(s):  
Ring Opening ◽  
Highly Efficient ◽  
Ring Opening Reaction ◽  
Selective Ring Opening

A facile ring opening reaction of furfuryl selenides. Highly efficient method for dienones

1980 ◽  
Vol 21 (33) ◽  
pp. 3209-3212 ◽  
Author(s):  
Isao Kuwajima ◽  
Showay Hoshino ◽  
Toshihiko Tanaka ◽  
Makoto Shimizu
Keyword(s):  
Efficient Method ◽  
Ring Opening ◽  
Highly Efficient ◽  
Ring Opening Reaction

Highly Efficient Ring-Opening Reaction of Azlactone-Based Copolymer Platforms for the Design of Functionalized Materials

2012 ◽  
Vol 33 (9) ◽  
pp. 848-855 ◽  
Author(s):  
Aurélie Laquièvre ◽  
Naomi S. Allaway ◽  
Joël Lyskawa ◽  
Patrice Woisel ◽  
Jean-Marc Lefebvre ◽  
...  
Keyword(s):  
Ring Opening ◽  
Highly Efficient ◽  
Ring Opening Reaction ◽  
Functionalized Materials

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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