Helvetica Chimica Acta p. 1858 - 1861 (1986)
Update date:2022-08-05
Topics: Regioselectivity Column chromatography Yield NMR spectroscopy Catalyst Solvent Enantiomeric excess (ee) Optically active Diastereomers Reaction Mechanism Stereoselectivity Cycloaddition Chiral Auxiliary Ketenes
Frater, Georg
Mueller, Urs
Guenther, Wulf
<2+2>Cycloaddition of (methyloxy)methylketene (2) to cis-ethyl propenyl ether showed a ca. 3:1 diastereoselectivity.A two-step transformation of the thermodynamically more stable adduct 4 furnished the (2R*,3R*)-compound 5 with ca. 5
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