77221-08-0Relevant academic research and scientific papers
Iminophosphorane-Mediated Synthesis of Mesoionic 1,3,4-Oxadiazolopyridinylium-2-aminides
Molina, Pedro,Alajarin, Mateo,Vega, Maria Jesus Perez de,Foces-Foces, Maria de la Concepcion,Canon, Felix Hernandez
, p. 1495 - 1500 (2007/10/02)
Reaction of iminophosphorane 2 with methyl isocyanate yields the mesoionic 1,3,4-oxadiazolopyridinylium-2-methylaminide 3, which undergoes N-methylation with CF3SO3CH3 to give the 1,3,4-oxadiazolopyridinium cation 4.The structure of compound 4 has been established by means of X-ray crystallography.Mesoionic aminide 3 undergoes rearrangement by the action of base to give the isomeric mesoionic compound 1,3,4-triazolopyridinylium-2-olate 11.Compound 3 by the action of (arylimino)triphenylphosphoranes is converted into the corresponding 1,3,4-oxadiazolopyridinylium-2-arylaminides 12, which can be also prepared from iminophosphorane 2 and hydroximoyl chlorides.
Fused Mesoionic Heterocycles: Synthesis of 1,3,4-Triazolopyridine Derivatives
Molina, Pedro,Alajarin, Mateo,Argues, Antonio,Benzal, Raimundo,Hernandez, Higinio
, p. 1891 - 1897 (2007/10/02)
A number of mesoionic derivatives of 1,3,4-triazolopyridine have been prepared.The 1,3,4-oxadiazolopyridylium-2-aminides , available from 1,3,4-oxadiazolopyridylium-2-olate (12) and N-aryliminotriphenylphosphoranes, under
FUSED MESOIONIC HETEROCYCLES : SYNTHESIS OF 1,3,4-TRIAZOLO(3,2-A)PYRIDINE DERIVATIVES
Molina, P.,Alajarin, M.,Arques, A.,Benzal, R.,Hernandez, H.
, p. 3523 - 3526 (2007/10/02)
A number of mesoionic compounds derivatives of the bicyclic system 1,3,4-triazolo(3,2-a)pyridine have been prepared, and an improved method for the preparation of 1,3,4-oxadiazolo(3,2-a)pyridylium-2-aminides from 1,3,4-oxadiazolo(3,2-a)pyridylium-2-olate and iminophosphoranes is described.
Fused Mesoionic Heterocycles: Synthesis of 1,3,4-Oxadiazolopyridine and 1,3,4-Thiadiazolopyridine Derivatives
Molina, Pedro,Alajarin, Mateo,Arques, Antonio,Benzal, Raimundo
, p. 351 - 356 (2007/10/02)
Two general methods are reported for the preparation of mesoionic derivatives of 1,3,4-oxadiazolopyridine and 1,3,4-thiadiazolopyridine from 1-amino-4,6-diphenyl-2-pyridone (3) and 1-amino-4,6-diphenylpyridine-2-thione (4), respectively.The
