Dynamic NMR study of rotation around carbon-carbon double bond in esters of ?-nitro-?-arylaminoacrylic acids

1977 ◽  
Vol 26 (12) ◽  
pp. 2610-2612
Author(s):  
V. I. Bakhmutov ◽  
V. A. Burmistrov ◽  
K. K. Babievskii ◽  
V. M. Belikov ◽  
�. I. Fedin
Keyword(s):  
Double Bond ◽  
Dynamic Nmr ◽  
Carbon Double Bond ◽  
Nmr Study

Dynamic 1H NMR study around the heteroaryl–carbon and carbon–carbon single bonds and also around carbon–carbon double bond in a particular phosphorous ylide involving a 2-methyl indole

2009 ◽  
Vol 50 (26) ◽  
pp. 3621-3624 ◽  
Author(s):  
Sayyed Mostafa Habibi-Khorassani ◽  
Malek Taher Maghsoodlou ◽  
Ali Ebrahimi ◽  
Fatemeh Vasheghani Farahani ◽  
Elahe Mosaddeg ◽  
...  
Keyword(s):  
Double Bond ◽  
1H Nmr ◽  
Carbon Double Bond ◽  
Nmr Study ◽  
Dynamic 1H Nmr ◽  
Single Bonds

Dynamic 1 H NMR study around the carbon-carbon single bond and partial carbon-carbon double bond in the two particular phosphorus ylides and in an enaminoester

2011 ◽  
Vol 49 (5) ◽  
pp. 213-220 ◽  
Author(s):  
Sayyed Mostafa Habibi-Khorassani ◽  
Ali Ebrahimi ◽  
Malek Taher Maghsoodlou ◽  
Sara Same-Salari ◽  
Shahin Nasiri ◽  
...  
Keyword(s):  
Double Bond ◽  
Single Bond ◽  
Phosphorus Ylides ◽  
H Nmr ◽  
Carbon Double Bond ◽  
Nmr Study

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.

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