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Unexpected behaviour of the oxidizing agent sodium m ‐nitrobenzenesulfonate: Synthesis of a new class of 5‐hydroxy benzopyrano‐[4,3‐ c ]pyridazin‐3(2 H )‐ones
Author(s) -
Cignarella Giorgio,
Barlocco Daniela
Publication year - 1995
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570320114
Subject(s) - chemistry , oxidizing agent , dehydrogenation , nitrobenzene , sulfonate , substrate (aquarium) , medicinal chemistry , sodium , stereochemistry , organic chemistry , catalysis , oceanography , geology
Sodium m ‐nitrobenzene sulfonate, widely used in dehydrogenation of 4,5‐dihydro‐3(2 H )‐pyridazinones to their corresponding aromatic derivatives, behaves in an unexpected way when 4,4a‐dihydro‐5 H [1]benzopyrano[4,3‐ c ]pyridazin‐3(2 H )‐ones are employed as substrate. The synthesis of a new class of 5‐hydroxy[1]benzopyrano[4,3‐ c ]pyridazin‐3(2 H )‐ones is described.