Preparative Organic Chemistry
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ChemInform Abstract: Reaction of Phosphorus Ylides with Elemental Selenium: Generation of Selenoaldehydes and Selenium-Catalyzed Ph3P=CHR Cleavage to Give RHC=CHR and Triphenylphosphine.
First published: May 3, 1988
Abstract
The phosphoranes (I) react with gray selenium via a Wittig olefination-type reaction of the intermediate selenoaldehydes (II) to give the products (III) and (IV).
ChemInform Abstract
The phosphoranes (I) react with gray selenium via a Wittig olefination-type reaction of the intermediate selenoaldehydes (II) to give the products (III) and (IV). In the presence of the diene (VI) Diels-Alder reaction with (IIa) takes place and leads to the formation of compound (VII).
