1997 ring closure reactions ring closure reactions O 0130 27 -050 1-Substituted 3-Dimethylaminoprop-2-en-1-ones (III) as Building Blocks in Heterocyclic Synthesis: Routes to 6-Aryl-and 6-Heteroaryl-2H-pyran-2-ones (V) and 6-and 4-Arylpyridin-2(1H)-ones (VIII) and (X). --(AL-OMRAN, F.; AL-AWADHI, N.; ABDEL KHALIK, M. M.; KAUL, K.; EL-KHAIR, A. A.; ELNAGDI, M. H.; J.
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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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