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Cyclization of ylidenemalononitriles. VII. Studies on sulfur‐containing heterocyclic systems
Author(s) -
Campaigne E.,
Burton H. R.,
Blanton C. D.,
Schneller S. W.
Publication year - 1971
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.5570080114
Subject(s) - malononitrile , chemistry , disproportionation , sulfur , ring (chemistry) , adduct , closure (psychology) , organic chemistry , medicinal chemistry , catalysis , economics , market economy
Ring closure of ylidenemalononitrile adducts has been extended to the syntheses of isomeric sulfur heterocycles. The malononitrile derivatives of thiochromanone, thiochromone and iso‐thiochromanone have been synthesized, and results of the acidic ring closure experiments on these compounds are reported. The thiochromanone adducts gave an interesting disproportionation reaction, and experiments designed to support the proposed route are presented.