Homoallyllic nitrone isomerization: Convenient enantioselective synthesis of homoallylic nitrones and homoallylic hydroxylamines
(Chemical Equation Presented) An α-regioselective synthesis of homoallylic nitrones from aldehydes is reported on the basis of [3,3]-sigmatropic rearrangement. The products are obtained in up to 99% enantioselectivity and up to 80% yield under environment
Cheng, Hin-Soon,Seow, Ai-Hua,Loh, Teck-Peng
supporting information; experimental part
p. 2805 - 2807
(2009/05/26)
Diastereoselective Addition of Crotylboronates to Oximes
The addition of E- and Z-crotylboronates 8,9 to aldoximes has been realized in good yields by running the reaction under 4-9 kbar pressure.The direction of the attendant diastereoselectivity was surprising: E-8 led preferentially to the anti-, Z-9 to the syn-N-(β-methylalkyl)hydroxylamines 10, 11.
Hoffmann, Reinhard W.,Endesfelder, Andreas
p. 215 - 220
(2007/10/02)
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