4-Bromo-3-methyl-1-phenylpyrazole in Heterocyclic Synthesis: Unexpected Polysubstituted Pyrazole Derivatives
作者:Eman A. El-Rady、Fawi M. Abd El Latif
DOI:10.1002/jccs.200400119
日期:2004.8
Unexpected 4,4′-dipyrazolomethylidene (7), 4-amino-3a-bromo-3-methyl-1-phenylpyrazolo[3,4-b]pyridin-6-thione (9), 4,4′-dipyrazolyl (18), ethyl 4-(3-methyl-1-phenylpyrazole-4-yl)fuoro[2,3-c]pyrazole-4-carboxylate (25), as well as the expected fuoro[2,3-c]pyrazolederivatives (15), (20) and (28) were isolated from a one-pot reaction of 4-bromo-3-methyl-1-phenylpyrazole (1) with some readily available
Analytical systems and assays are disclosed which can be used to sensitively and rapidly detect a wide variety analytes. The assays are carried out using haloperoxidase, halide, peroxide and a signal-generating compound which upon halogenation provides a detectable change in spectral absorption.
Reaction of 2-Chloro-1-alkyl-1H-Indol-3-carbaldehydes with Barbituric Acids and 5-Methyl-2-phenyl-2,4-dihydropyrazol-3-one. Formation of Compound with Extremely Short Intramolecular Hydrogen Bond in Eight-Membered Pseudocycle
作者:Konstantin F. Suzdalev、Maria N. Babakova、Victor G. Kartsev、Konstantin A. Krasnov
DOI:10.3987/com-14-13135
日期:——
New indolin-2-one derivatives, containing in its molecules eight-membered pseudo-cycle with unusually short intramolecular hydrogen bond in OHO-bridge have been synthesized by reaction of 2-chloro-1-alkyl-1H-indole-3-carbaldehyde with barbituric acids or 5-methyl-2-phenyl-2,4-dihydropyrazol-3-one. Under the action of amines they undergo fragmentation to 5-aminomethylenebarbituric acids or 4-aminomethylenepyrazolones and 1-alkyl-1,3-dihydroindo1-2-ones.
Reaction of 5-azacytosine with 3-methyl-1-phenyl-5-pyrazolone
作者:Yu. A. Azev、I. V. Teplyashina、B. V. Golomolzin
DOI:10.1007/bf02253232
日期:1997.9
Reaction of dipyrazolylmethanes with 1-phenyl-3-methylpyrazol-5-one