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2005
Oxathiane derivatives
R 0480
Conversion of 1,3-Oxathiolanes to 1,4-Oxathianes Using a Silylated Diazoester.
The Cu-catalyzed treatment of 1,3-oxathiolanes with the diazoacetate (IIa) offers an
12- 158 —
efficient approach to 1,4-oxathianes. 2-Alkyl and 2-aryl substituted derivatives react
successfully under these conditions. Unsubstituted 1,3-oxathiolane also undergoes ring
expansion; however, the resulting product is unstable and cannot be isolated. —
(IOANNOU, M.; PORTER*, M. J.; SAEZ, F.; Tetrahedron 61 (2005) 1, 43-50; Dep.
Chem., Univ. Coll., London WC1H 0AJ, UK; Eng.) — Jannicke
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