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5‐Isopropyliden‐1,2‐oxathiole 2‐Oxide by Photoisomerization of 2,2‐Dimethyl‐3(2 H )‐thiophenone 1‐Oxide
Author(s) -
Kowalewski Ronald,
Margaretha Paul
Publication year - 1988
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.198813741
Subject(s) - photoisomerization , diradical , chemistry , oxide , photochemistry , isomerization , irradiation , medicinal chemistry , organic chemistry , catalysis , nuclear physics , singlet state , excited state , physics
The cyclic s‐trans ‐1,3‐dienes 3 are novel, highly promising synthetic intermediates . They may be obtained easily and selectively from the cyclic ketovinyl sulfoxides 2 . This photoreaction is surprising, for the compounds 1 react completely differently upon irradiation. The photoisomerization of 2 presumably occurs via the diradical 4 as intermediate.