[π 2 +π 2 ] Cycloadditions of 4‐Phenyl‐4 H ‐1,2,4‐triazole‐3,5‐dione and Singlet Oxygen to Homofuran | Zendy

Adam Waldemar | Zendy; Griesbeck Axel | Zendy; Klärner FrankGerrit | Zendy; Schröer Dietmar | Zendy

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[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.

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