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1,3-dithiane is a cyclic organic compound containing a six-membered ring with four carbon atoms and two sulfur atoms at positions 1 and 3. It is a type of organosulfur compound and a heterocycle.12

1,3-dithianes are particularly useful in organic synthesis. They can be converted into ketones and aldehydes through a process known as the Corey-Seebach reaction. Additionally, they can be transformed into olefins via the Takeda olefination reaction.2

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