Premium
[π 2 +π 2 ] Cycloadditions of 4‐Phenyl‐4 H ‐1,2,4‐triazole‐3,5‐dione and Singlet Oxygen to Homofuran
Author(s) -
Adam Waldemar,
Griesbeck Axel,
Klärner FrankGerrit,
Schröer Dietmar
Publication year - 1986
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198609891
Subject(s) - singlet oxygen , cycloaddition , chemistry , triazole , singlet state , oxygen , combinatorial chemistry , medicinal chemistry , photochemistry , computational chemistry , organic chemistry , catalysis , excited state , physics , nuclear physics
No competition between [ π 2+ π 2]‐ and [( σ 2+ π 2)+ π 2]‐cycloaddition , but exclusively the first mentioned reaction is observed in reactions of homofuran 1 . With triazolidine and 1 O 2 it forms the products 2 and 3 , respectively, probably via zwitterionic intermediates.