Synthesis and dynamic 1H NMR study around the carbon-carbon double bond in the new stable phosphorus ylides derived from the reaction between hexamethyl phosphorous triamide and dimethyl acetylenedicarboxylate in the presence of NH-heterocyclic compounds

2011 ◽  
Vol 23 (2) ◽  
pp. 131-137 ◽  
Author(s):  
Morteza Ziyaadini ◽  
Malek Taher Maghsoodlou ◽  
Nourollah Hazeri ◽  
Sayyed Mostafa Habibi-Khorassani
Keyword(s):  
Double Bond ◽  
1H Nmr ◽  
Heterocyclic Compounds ◽  
Dimethyl Acetylenedicarboxylate ◽  
Phosphorus Ylides ◽  
Carbon Double Bond ◽  
Nmr Study ◽  
Dynamic 1H Nmr ◽  
Stable Phosphorus Ylides

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

Synthesis and dynamic 1H NMR study of stable phosphorus ylides derived from reaction between heterocyclic NH-acids and triphenylphosphine in the presence of acetylenic esters

2006 ◽  
Vol 2006 (4) ◽  
pp. 215-217 ◽  
Author(s):  
Nourollah Hazeri ◽  
Sayyed M. H. Khorassani ◽  
Malek T. Maghsoodlou ◽  
Ghasem Marandi ◽  
Mahmoud Nassiri ◽  
...  
Keyword(s):  
1H Nmr ◽  
Phosphorus Ylides ◽  
Acetylenic Esters ◽  
Nmr Study ◽  
Dynamic 1H Nmr ◽  
Stable Phosphorus Ylides

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 1H-NMR study of unusually high barrier to rotation about the partial C N double bond in N,N-dimethyl carbamoyl 5-aryloxytetrazoles

2017 ◽  
Vol 1133 ◽  
pp. 244-252 ◽  
Author(s):  
Fahimeh Movahedifar ◽  
Ali Reza Modarresi-Alam ◽  
Erich Kleinpeter ◽  
Uwe Schilde
Keyword(s):  
Double Bond ◽  
1H Nmr ◽  
Nmr Study ◽  
Dynamic 1H Nmr

Theoretical study and synthesis of the reaction between triphenylphosphine, dialkyl acetylenedicarboxylates and 2-aminobenzimidazole, 2-hydroxy-3-nitropyridine or 1,2,3,4-tetrahydrocarbazole

2010 ◽  
Vol 75 (8) ◽  
pp. 785-805 ◽  
Author(s):  
Sayyed Mostafa Habibi-Khorassani ◽  
Malek Taher Maghsoodlou ◽  
Ali Ebrahimi ◽  
Reza Heydari ◽  
Nourollah Hazeri ◽  
...  
Keyword(s):  
Double Bond ◽  
Carbonyl Group ◽  
Heterocyclic Compounds ◽  
Theoretical Study ◽  
Theoretical Calculations ◽  
Phosphorus Ylides ◽  
Geometrical Isomers ◽  
Dialkyl Acetylenedicarboxylates ◽  
Single Isomer ◽  
Stable Phosphorus Ylides

Triphenylphosphine reacts with dialkyl acetylenedicarboxylates in the presence of heterocyclic compounds, such as 2-aminobenzimidazole, 2-hydroxy-3-nitropyridine or 1,2,3,4-tetrahydrocarbazole to generate stable phosphorus ylides. Some ylides exist in solution as a mixture of two geometrical isomers as a result of restricted rotation around the carbon–carbon partical double bond resulting from conjugation of the ylide moiety with the adjacent carbonyl group, whereas others occur as a single isomer only. For this reason, the assignments of more stable Z- or E-isomers as the major or minor forms were investigated using theoretical calculations.

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

scholarly journals A facile synthesis, dynamic 1H NMR and theoretical study the novel stable heterocyclic phosphorus ylides containing tetrazole

ARKIVOC ◽  
2009 ◽  
Vol 2008 (17) ◽  
pp. 173-183
Author(s):  
M. Amin Kazemian ◽  
Mahmoud Nassiri ◽  
Ali Ebrahimi ◽  
M. Taher Maghsoodlou ◽  
S. Mostafa Habibi-Khorassani ◽  
...  
Keyword(s):  
1H Nmr ◽  
Theoretical Study ◽  
The Novel ◽  
Phosphorus Ylides ◽  
Facile Synthesis ◽  
Dynamic 1H Nmr
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