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[4+2] Cycloaddition of 2(1 H )‐pyrazinones and 1,2,4‐triazoline‐3,5‐diones
Author(s) -
Nishio Takehiko
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.5570350326
Subject(s) - chemistry , cycloaddition , medicinal chemistry , stereochemistry , organic chemistry , catalysis
The reaction of 2(1 H )‐pyrazinones 1 and 1,2,4‐triazoline‐3,5‐diones 3 was investigated by comparing that of 1 with singlet oxygen. 2(1 H )‐Pyrazinones 1 reacted in Diels‐Alder fashion with 1,2,4‐triazoline‐3,5‐diones 3 to afford [4+2]‐adducts 4–17 in high yields.