Stereoselective Protonation of Carbanions, 3. - 1,3-Dioxolan-4-ones and 1,3-Oxazolidine-4-ones: Syntheses and Diastereoselective Protonation of their Anions
Dioxolonanones 3 and oxazolidinones 4 are synthesized by different methods together with the silyl enol ether 3aSi.The configuration of their diastereomers is determined by (1)H-NMR spectroscopy and relative retention times (vpc), backed by a c
Huenig, Siegfried,Keita, Yango,Peters, Karl,Schnering, Hans-Georg von
p. 1495 - 1500
(2007/10/02)
A new highly diastereoselective synthesis of 2,5-disubstituted-1,3-dioxolan-4-ones from α-hydroxyacids
Reaction of α-hydroxyacids with acetals under weak acid catalysis gave the corresponding dioxolanones with a better diastereomeric ratio than the usual strong acid catalyzed synthesis from aldehydes.
Chapel,Greiner,Ortholand
p. 1441 - 1442
(2007/10/02)
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