Bis-Pyrazolones as azodienophiles

Autor: Bernard T. Gillis, James C. Valentour
Rok vydání: 1970
Předmět:
Zdroj: Journal of Heterocyclic Chemistry. 7:1131-1135
ISSN: 1943-5193
0022-152X
DOI: 10.1002/jhet.5570070520
Popis: Lead tetraacetate oxidations of 2,3,3a,4,6,7,7a,8-octahydrobenzo[1,2-c:4,5-c']dipyrazolo-3,7-dione and 2,3,3a,4,5,5a,6,7-octahydrobenzo[2,1-c:3,4-c']dipyrazolo-3,6-dione in the presence of 1,3-cyclopentadiene, 1,3-cyclohexadiene, 2,3-dimethyl-1,3-butadiene or 1,4-diphenyl-1,3-butadiene have yielded octahydrodipyridazino[1,2-a:1,2-a']benzo[1,2-c:4,5-c']dipyrazolo-6,14-diones and octahydrodipyridazino[1,2-a:1,2-a']benzo[2,1-c:3,4-c']dipyrazolo-6,9-diones. In one of the eight Diels-Alder reactions two isomeric products were isolated.
Databáze: OpenAIRE
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