منابع مشابه
Theoretical characterization of 5 - oxo , 7 - oxo and 5 - oxo - 7 - amino [ 1 , 2 , 4 ] triazolo [ 1 , 5 - a ] pyrimidines †
Accurate ab initio calculations at the B3LYP/6-311 G** level have been performed on anionic and neutral structures of 4,5-dihydro-5-oxo[1,2,4]triazolo[1,5-a]pyrimidine, 4,7-dihydro-7-oxo[1,2,4]triazolo[1,5-a]pyrimidine, and 4,5-dihydro-7-amino-5-oxo[1,2,4]triazolo[1,5-a]pyrimidine compounds. The quality of the theoretical results has been tested against the experimental X-ray structures for the...
متن کاملEthyl 5-oxo-2,3-diphenylcyclopentane-1-carboxylate
The title compound, C(20)H(20)O(3), was prepared by an acyl-oin-type condensation reaction in the presence of sodium sand and dry ether using ethyl cinnamate as the starting material. The C-O bond lengths for the carbonyl groups are 1.191 (2) and 1.198 (2) Å, while the C-O bond in the ester group is 1.335 (2) Å. The C-C bond lengths in the phenyl groups average 1.375 Å, while the C-C bonds in t...
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The title compound, [Ni(C4H8N3)2]·CH3OH, contains two independent Ni(II) atoms, each located on an inversion center and coordinated by four N atoms from two 1-[(1-imino-eth-yl)imino]-eth-yl}aza-nide ligands in a square-planar geometry. N-H⋯N, N-H⋯O and O-H⋯N hydrogen bonds link the complex mol-ecules and methanol solvent mol-ecules into a corrugated layer parallel to (001).
متن کاملSynthesis of 5-amino-1-aryl-4-cyanoimidazoles from formamidines under solvent-free condition
The aryl-(Z)-N-[2-amino-1,2-dicyanovinyl]formamidine 2 cyclize in solvent-free conditions and in the presence of a base to give a 5-amino-1-aryl-4-cyanoimidazoles 3. Silica sulfuric acid as an efficient and reusable heterogeneous catalyst has been used for the preparation of amidines 2 from formimidate 1 through reaction with aromatic amines at room temperature and in good to excellent yields. ...
متن کاملSynthesis of 5-amino-1-aryl-4-cyanoimidazoles from formamidines under solvent-free condition
The aryl-(Z)-N-[2-amino-1,2-dicyanovinyl]formamidine 2 cyclize in solvent-free conditions and in the presence of a base to give a 5-amino-1-aryl-4-cyanoimidazoles 3. Silica sulfuric acid as an efficient and reusable heterogeneous catalyst has been used for the preparation of amidines 2 from formimidate 1 through reaction with aromatic amines at room temperature and in good to excellent yields. ...
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ژورنال
عنوان ژورنال: ACS Medicinal Chemistry Letters
سال: 2015
ISSN: 1948-5875,1948-5875
DOI: 10.1021/acsmedchemlett.5b00321