Abstract
Acetylenes ( 1 ), carrying two bulky alkyl substituents, reacted with sulfur dichloride (ClSCl) to give 2,3-dialkyl-2,3-dichlorothiiranes ( 2 ) nearly quantitatively. The alkaline hydrolysis of crude 2 resulted in the formation of thiirene 1-oxides ( 3 ) in 68–90% yields based on 1 , thus providing a convenient synthesis of 3 .
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