Solid-acid catalysed rearrangement of cyclic α,β-epoxy ketones
Various cyclic α,β-epoxy ketones rearranged to α-formyl ketones and/or vicdiones in the presence of catalytic amounts of zeolites and montmorillonite K10. This provides an excellent alternative to conventional homogeneous systems with respect to yields and workup. Differences in product distribution and type of products in the rearrangement of pulegone oxide could be reasonably explained by invoking different pathways for homogeneous and heterogeneous catalysts.
Elings, Jacob A.,Lempers, Hans E. B.,Sheldon, Roger A.
p. 1905 - 1911
(2007/10/03)
REGIOSELECTIVE REDUCTIONS OF 2,3-EPOXY ACETALS WITH ZINC-CHLOROTRIMETHYLSILANE AND LITHIUM ALUMINIUM HYDRIDE: CONVENIENT SYNTHESIS OF 1,2 AND 1,3-DIONES
A variety of 2,3-epoxy acetals have been found to undergo regioselective reductions with zinc-chlorotrimethylsilane and lithium aluminium hydride to give 2-hydroxy and 3-hydroxy acetals respectively.Their oxidation followed by hydrolysis furnished the corresponding 1,2- and 1,3-diones in good yields.
Vankar, Yashwant D.,Chaudhuri, Narayan C.,Rao, C. Trinadha
p. 551 - 554
(2007/10/02)
The reaction of alpha,beta-unsaturated cycloalkenones with azides. I. The anomalous products in the Schmidt reaction.
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Mitsuhashi,Nomura
p. 951 - 958
(2007/10/04)
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