Journal
TETRAHEDRON LETTERS
Volume 58, Issue 16, Pages 1651-1654Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2017.03.039
Keywords
Thiirane; Diazo compound; Metal carbene; 4-Oxathiine; Ring expansion
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Synthesis of 3-acy1-5,6-dihydro-1,4-oxathiines has been achieved via reactions of thiiranes and alpha-diazo-beta-1,3-dicarbonyl compounds under microwave and copper sulfate-assisted conditions. The current method provides a direct and simple strategy in efficient preparation of 3-acy1-1,4-oxathiines from readily available thiiranes and trans-3-acy1-5,6-dihydro-1,4-oxathiines as stereospecific products for 1,2-disubstituted cis-thiiranes. The reaction mechanism was also proposed. (C) 2017 Elsevier Ltd. All rights reserved.
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