Rotational Energy Barrier of the Polarized Carbon-Carbon Double Bond in Quinophthalone

2002 ◽  
Vol 133 (8) ◽  
pp. 1109-1113 ◽  
Author(s):  
Issa Yavari ◽  
Mehdi Adib ◽  
Hamid R. Bijanzadeh ◽  
Majid M. M. Sadegi ◽  
Hossein Logmani-Khouzani ◽  
...  
Keyword(s):  
Double Bond ◽  
Energy Barrier ◽  
Rotational Energy ◽  
Carbon Double Bond

Synthesis and Study of Dynamic 1H NMR of Carbon–Carbon Double Bond Rotation Energy Barrier in Stable Phenothiazine Phosphorus Ylides

2007 ◽  
Vol 182 (3) ◽  
pp. 647-655 ◽  
Author(s):  
Malek Taher Maghsoodlou ◽  
Sayyed Mostafa Habibi Khorassani ◽  
Uranous Niroumand ◽  
Faramarz Rostami Charati ◽  
Maryam Khosrosharodi
Keyword(s):  
Double Bond ◽  
1H Nmr ◽  
Energy Barrier ◽  
Phosphorus Ylides ◽  
Bond Rotation ◽  
Carbon Double Bond ◽  
Dynamic 1H Nmr ◽  
Rotation Energy

A low energy barrier for rotation around carbon—carbon double bond

1967 ◽  
Vol 8 (34) ◽  
pp. 3259-3265 ◽  
Author(s):  
Youval Shvo ◽  
K.C. Taylor ◽  
Juan Bartulin
Keyword(s):  
Double Bond ◽  
Energy Barrier ◽  
Low Energy ◽  
Carbon Double Bond

Reactions of 4-Pyrones with Azomethine Ylides as a Chemo­selective Method for the Construction of Multisubstituted Pyrano[2,3-c]pyrrolidines

Synthesis ◽  
2021 ◽  
Author(s):  
Dmitrii L. Obydennov ◽  
Vyacheslav D. Steben’kov ◽  
Konstantin L. Obydennov ◽  
Sergey A. Usachev ◽  
Vladimir S. Moshkin ◽  
...  
Keyword(s):  
Double Bond ◽  
Ring Opening ◽  
Azomethine Ylides ◽  
Azomethine Ylide ◽  
Dipolar Cycloaddition ◽  
Computational Studies ◽  
Carbon Double Bond ◽  
Reactivity Indexes ◽  
Reaction Proceeds

Abstract4-Pyrones bearing electron-donating and electron-withdrawing groups react with nonstabilized azomethine ylides to form pyrano[2,3-c]pyrrolidines in moderate to good yields. The reaction proceeds chemoselectively as a 1,3-dipolar cycloaddition of the azomethine ylide at the carbon–carbon double bond of the pyrone activated by the electron-withdrawing substituent. The reactivity of 4-pyrones toward azomethine ylides was rationalized by computational studies with the use of reactivity indexes. The pyrano[2,3-c]pyrrolidine moiety could be modified, for example by a ring-opening transformation under the action of hydrazine to provide pyrazolyl-substituted pyrrolidines.

Cycloaddition reactions across the carbon-carbon double bond of thiirene 1,1-dioxide

1984 ◽  
Vol 49 (7) ◽  
pp. 1300-1302 ◽  
Author(s):  
Mitsuo Komatsu ◽  
Yasuo Yoshida ◽  
Masatoshi Uesaka ◽  
Yoshiki Ohshiro ◽  
Toshio Agawa
Keyword(s):  
Double Bond ◽  
Cycloaddition Reactions ◽  
Carbon Double Bond

ChemInform Abstract: Electrooxidative Fission of Carbon-Carbon Double Bond in a K2OsO2(OH)4/ HIO4 Double Mediatory System.

ChemInform ◽  
2010 ◽  
Vol 27 (5) ◽  
pp. no-no
Author(s):  
H. TANAKA ◽  
R. KIKUCHI ◽  
M. BABA ◽  
S. TORII
Keyword(s):  
Double Bond ◽  
Carbon Double Bond

Unusual carboncarbon double bond cleavage in thiophenohomotropone system promoted by ethanedithiol

1982 ◽  
Vol 23 (28) ◽  
pp. 2859-2862 ◽  
Author(s):  
Bernard Hanquet ◽  
Mohammed El Borai ◽  
Roger Guilard ◽  
Yves Dusausoy
Keyword(s):  
Double Bond ◽  
Bond Cleavage ◽  
Carbon Double Bond
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