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Synthesis of 4‐Aryl‐3‐(2‐chromonyl)‐2‐pyrazolines by the 1,3‐dipolar cycloaddition of 2‐styrylchromones with diazomethane
Author(s) -
Pinto Diana C. G. A.,
Silva Artur M. S.,
Almeida Lúcia M. P. M.,
Cavaleiro José A. S.,
Lévai Albert,
Patonay Tamás
Publication year - 1998
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.5570350140
Subject(s) - diazomethane , chemistry , cycloaddition , aryl , 1,3 dipolar cycloaddition , medicinal chemistry , organic chemistry , catalysis , alkyl
The first reported 1,3‐dipolar cycloaddition of 2‐styrylchromones with diazomethane afforded 4‐aryl‐3‐(2‐chromonyl)‐2‐pyrazolines. However, 3‐aryl‐4‐(2‐chromonyl)‐1‐pyrazolines have been also found as minor products of this reaction. These two series of pyrazolines have been fully characterized.