308818-91-9Relevant academic research and scientific papers
Diastereoselective Radical Hydrogenation of α-(1-Hydroxyalkyl)vinyl Sulfoxides and Sulfones Controlled by Intramolecular Hydrogen Bonding
Mase, Nobuyuki,Watanabe, Yoshihiko,Toru, Takeshi,Kakumoto, Terumitsu,Hagiwara, Tsuneo
, p. 7083 - 7090 (2007/10/03)
The reaction of (S)-α-(1-hydroxyalkyl)vinyl sulfoxides (S)-5 with alkyl radicals and tributyltin hydride gave the addition-hydrogenation products with high diastereoselectivity, whereas the reaction with (R)-α-(1-hydroxyalkyl)vinyl sulfoxides (R)-5 resulted in complete recovery of the starting sulfoxides. Stereoselective intramolecular hydrogen bonding between the hydroxy group and the diastereotopic sulfonyl oxygen led to high diastereoselectivity in the radical reaction of α-(1-hydroxyethyl)vinyl sulfone 12. An important role of intramolecular hydrogen bonding on the diastereoselectivity as well as the reactivity toward alkyl radicals is discussed.
