The 1,4-dicarbonyl and 1,4,7-tricarbonyl compounds 1 cyclize with ammonia or methylamine to yield the pyrroles 2. Dependent on the temp. the 1,4-diketone 1b reacts with hydrazine in ethanole to form the pyridazine 3 or the N-amino-pyrrole 4, respectively.
Gorlitzer,Bomeke
p. 13 - 15
(2007/10/02)
Cyclisierung von 1,4-Dicarbonylverbindungen aus Etacrynsaeure
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Goerlitzer, K.,Boemeke, M.
p. 714
(2007/10/02)
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