Studies with 3-Oxoalkanenitriles: Synthesis of New Pyrazolo[1,5-a]pyrimidines and Pyrazolo[5,1-c]-1,2,4-triazines and Reactivity of 4-Phenyl-3-oxobutanenitrile Derivatives

Khalik, M. M. Abdel

doi:10.1039/a700024c

Cited by 5 publications

(1 citation statement)

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“…Similarly to the previous cases, as-triazine ring closure required the presence of nitrile group. There is some controversy in the literature regarding the interpretation of this type of reactions: in some cases the isolation of compounds 84 is reported [49,100,131,145,154,167], while in other cases compounds 85 were isolated [92,108,[168][169][170][171], despite the identical starting materials and reaction conditions.…”

Section: Intermolecular Azo Couplingmentioning

confidence: 99%

Chemistry of Pyrazole-3(5)-Diazonium Salts (Review)*

Ledenyova

Didenko

Shikhaliev

2014

Chem Heterocycl Comp

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The methods of synthesis, structure, reactivity, and synthetic utility of pyrazole-3(5)-diazonium salts are reviewed here for the first time, with emphasis on heterocyclization reactions of these compounds.More than one hundred years have passed since α-diazo derivatives of pyrazole were discovered. A substantial amount of knowledge has been accumulated over this time regarding the stability, structure, and transformations of these compounds. However, the chemistry of pyrazole-3(5)-diazonium salts developed rapidly only in the second half of the 20th century, with many studies performed in various countries, in particular Germany, Egypt, Russia, and Japan. Unfortunately, no systematic review has been compiled for the wide range of data about pyrazole-3(5)-diazonium salts. Some aspects regarding the properties of these compounds have been discussed in reviews and monographs on other topics [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].

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Section: Intermolecular Azo Couplingmentioning

confidence: 99%

Chemistry of Pyrazole-3(5)-Diazonium Salts (Review)*

Ledenyova

Didenko

Shikhaliev

2014

Chem Heterocycl Comp

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ChemInform Abstract: Studies with 3‐Oxoalkanenitriles: Synthesis of New Pyrazolo[1,5‐a]pyrimidines and Pyrazolo[5,1‐c]‐1,2,4‐triazines and Reactivity of 4‐Phenyl‐3‐oxobutanenitrile Derivatives.

Khalik

1997

ChemInform

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1997 ring closure reactions ring closure reactions O 0130 -061Studies with 3-Oxoalkanenitriles: Synthesis of New Pyrazolo[1,5a]pyrimidines and Pyrazolo[5,1-c]-1,2,4-triazines and Reactivity of 4-Phenyl-3-oxobutanenitrile Derivatives.-The synthesized 4phenyl-3-oxobutanenitrile (III) is identified by isolation of its aminomethylidene and hydrazone derivatives (V) and (IX). Both compounds prove versatile starting materials for the synthesis of a variety of polyfunctionally substituted heterocycles. -(ABDEL KHALIK, M. M.; J.

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