1,3-Dithienium- and 1,3-Dithiolenium Salts, III. Synthesis of Cyclic Dithioacetals of β-Keto Esters from Ketene Silyl Acetals
The 1,3-dithian-2-ylium tetrafluoroborates 3, available by different methods, react in good yields with the ketene silyl acetals 2 to give the new cyclic dithioacetals 4 which are deacetalized to the β-keto esters 5 and 9.
Stahl, Ingfried
p. 3159 - 3165
(2007/10/02)
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