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Synthesis and Some Reactions of 4-Benzoyl-5-Phenyl-1-Pyridin-2-yl-1H- Pyrazole-3-Carboxylic Acid
Cyclic oxalyl compounds Pyrazole Pyrazolo [3,4-d] Pyridazinone
2010/4/20
The 1H-pyrazole-3-carboxylic acid 2, obtained from the furandione 1 and 2-hydrazinopyridine, was decarboxylated to give 4-benzoyl-5-phenyl-1-pyridin-2-yl-pyrazole derivative 3. Some ester 4 derivative...
Synthesis and Some Reactions of 4-Benzoyl-5-Phenyl-1-(2,4,6-Trichloro Phenyl)-1H-Pyrazole-3-Carboxylic Acid
Cyclic oxalyl compounds Pyrazole Pyridazine Pyrazolo [3,4-d] Pyridazinone
2010/4/21
Furandione 1 was reacted with 2,4,6-trichlorophenylhydrazine to give the 1H-pyrazole-3-carboxylic acid 2 together with a new pyridazinone derivative 3. Then 2 was converted into the corresponding este...
1H, 13C, 119Sn NMR, Mass, Mössbauer and Biological Studies of Tri-,Di- and Chlorodiorganotin(IV) Carboxylates
1H 13C 119Sn NMR Mass Mö ssbauer Biological Studies
2010/4/21
The reaction of 2-[(2,3-dimethylphenyl)amino]benzoic acid (HL) with tri- and diorganotin(IV) chlorides yielded complexes of the type R3SnL and R2SnL2 (R = n-C4H9, C6H5, C6H5CH2, n-C8H17). The compound...
Synthesis and Reactivity of Tetrahydroimidazo [1,5-b][1,2,4]oxadiazol- 2(1H)-thiones
Imidazoline 3-oxides 1,3-Dipolar cycloaddition Tetrahydroimidazo[1,5-b][1,2,4]oxadiazol-2(1H)-thiones 4H-[1,2,4]oxadiazole-5-thione
2010/4/21
1,3-Dipolar cycloaddition of imidazoline 3-oxides 1 with methylisothiocyanate proceeds regio- and diastereoselectively to give tetrahydroimidazo[1,5-b][1,2,4]oxadiazol-2(1H)-thiones 3 in high yields. ...
1H NMR Studies of Some Imidazole Ligands Coordinated to Co(III)
1H NMR Imidazole Ligands Coordinated Co(III)
2010/4/21
Chemical shifts for proton signals of an imidazole ring coordinated to Co(III) move downfield as the total complex charge increases. However, the C(2) - H chemical shift of the imidazole ring in cis-[...
Synthesis of New Substituted 6-(morpholin-4-yl)-1H-Benzimidazole Derivatives
benzimidazole synthesis
2010/4/22
A series of various substituted benzimidazole derivatives containing fluoro and morpholino substituents at the 5 and 6 positions was synthesized and their structures were identified by spectroscopic t...
A Convenient Synthesis of Some 4-(Alkylamino)-4,5-dihydro-1H-1,2,4-triazol-5-ones
A Convenient Synthesis 4-(Alkylamino)-4,5-dihydro-1H-1,2,4-triazol-5-ones
2010/6/27
A series of 3-alkyl-4-(arylidenamino)-4,5-dihydro-1H-1,2,4-triazol-5-ones, {\bfseries 6-10,} was obtained from the reaction of the corresponding 3-alkyl-4-amino-4,5-dihydro-1H-1,2,4-triazol-5-ones, {...
Fifteen amidrazone derivatives (six being new compounds) were synthesized and their proton magnetic resonance spectra were recorded in trifluoroacetic acid (TFA). The protonation shifts, related to al...
Reactions of 4-Amino-4,5-Dihydro-1H-1,2,4-Triazol-5-ones and 4-Amino-4H-1,2,4-Triazoles with Some Carboxylic Acid Anhydrides
Reactions 4-Amino-4,5-Dihydro-1H-1,2,4-Triazol-5-ones 4-Amino-4H-1,2,4-Triazoles Some Carboxylic Acid Anhydrides
2010/7/1
3-Alkyl(Aryl)-4-tetrachlorophthalimido-4,5-dihydro-1H-1,2,4-triazol-5-ones (2) and 3-alkyl(aryl)-4-(1,8-naphthalimido)-4,5-dihydro-1H-1,2,4-triazol-5-ones (3) were synthesized from the reactions of 3-...
A Quantum-Chemical Investigation on 5,5'-BI(1H-1.2,4-Triazole))
Quantum-Chemical Investigation 5,5'-BI(1H-1.2,4-Triazole))
2010/8/15
The conformational analysis of flexible 5,5'-bi(1H-1,2,4-triazole) molecule containing various reaction centers has been performed by the semiempirical methods MNDO,AM1 and PM3, and the internal rotat...
封管样品的1H MAS谱——活性炭吸附H2S及醇类的NMR研究
活性炭吸附 1H MAS谱 封管样品
2010/1/22
封管样品的1H MAS谱——活性炭吸附H2S及醇类的NMR研究。
苯并氮杂冠醚化合物在氘代氯仿中的溶剂效应的动态1H NMR研究
溶剂效应 氘代氯仿 苯并氮杂冠醚化合物
2010/1/15
本文讨论了样品浓度对苯并氮杂冠醚化合物-氘代氯仿溶液~1H NMR镨及~1H纵向弛豫时间的影响(稀释位移效应)。在实验基础上提出了苯并氮杂冠醚化合物在氯仿中的叔胺-叔铵盐交换作用机制。以此馐土讼∈臀灰菩в? 并得到巳止诿鸦衔锎邮灏返绞屣а蔚姆从ζ胶獬Ｊ齂_2和交换速率常数k, 另外, 本文还讨论了冠醚环中氮原子上取代基对稀释位移效应的影响.