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Pyrolysis of aminonitriles, cyanohydrazones, and cyanoacetamides. Part II. Elimination reactions of arylacetylhydrazone, arylcyanoacetylhydrazone, and substituted cyanoacetamides

โœ Scribed by Nouria A. Al-Awadi; Mohamed H. Elnagdi; Tommy Mathew; Mervat Abdel Khalik

Book ID
101256476
Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
239 KB
Volume
28
Category
Article
ISSN
0538-8066

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โœฆ Synopsis

Rates of pyrolytic reactions of arylacetylhydrazone and arylcyanoacetylhydrazone ( I -4 ) of the general formula GCH,CONHN=CHAr (C = H . C N ) have been measured The increase in the acidity of the hydrogen atom involved in the six-centered elimination process suggested for these reactions causes a significant increase in rates and thus appears to be the limiting factor in these pyrolytic reactions The implication of this conclusion for the pyrolytic reactions of substituted cyanoacetamides (5-8). NCCH,CONHAr are considered The mechanism of pyrolytic reactions of compounds 15-81 appears to proceed through a 4-membered cyclic transition state. 0 1996 john Wiley G Sons, Inc

๐Ÿ“œ SIMILAR VOLUMES

Pyrolysis of aminonitriles, cyanohydrazo
Pyrolysis of aminonitriles, cyanohydrazones, and cyanoacetamides. Part I. Elimination reaction of 1-arylmethyleneamino-1,2-dihydro-4,6-dimethyl-2-oxopyridine-3-carbonitriles and substituted benzaldehyde cyanoacetylhydrazones
โœ Nouria A. Al-Awadi; Mohamed H. Elnagdi; Tommy Mathew; Ibrahim El-Gamry; Mervat A ๐Ÿ“‚ Article ๐Ÿ“… 1996 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 330 KB

Pyrolysis of the Schiff bases of 1 -arylmethylenearnino-l.2-dihydro-4.6-dirnethyl-2-oxopyr1dine-3-carbonitriles [ 1-5) has been studied These compounds eliminate via a six-membered transition state to produce substituted benzonitriles and 2-hydroxy-4.6-dirnethylpyridine-3- carbonitrile. These elimin