21298-82-8Relevant articles and documents
Enantioselective epoxidation of β,β-disubstituted enamides with a manganese catalyst and aqueous hydrogen peroxide
Clarasó, Carlota,Vicens, Laia,Polo, Alfonso,Costas, Miquel
, p. 2430 - 2435 (2019/03/29)
Enantioselective epoxidation of β,β-disubstituted enamides with aqueous hydrogen peroxide and a novel manganese catalyst is described. Epoxidation is stereospecific and proceeds fast under mild conditions. Amides are disclosed as key functional groups to enable high enantioselectivity.
Reactivity of substituted and unsubstituted diphenylphosphonium diylides towards carbonic anhydride derivatives
Cristau,Taillefer,Urbani,Fruchier
, p. 2005 - 2020 (2007/10/03)
The reactivity of diphenylphosphonium diylides was investigated towards carbonic anhydric derivatives. Unsubstituted and substituted non-stabilized diylides react with phenylisocyanate and dicyclohexylcarbodiimide, leading to the formation of new monoylide type intermediates. These last ones react in situ with carbonyl compounds through a Wittig reaction leading respectively to α,β-unsaturated amides and amidines. Substituted semi-stabilized or stabilized diylides, in similar conditions lead to the formation of alkenes. In all the cases a high E stereoselectivity, determined by 1H-NMR and 13-C-NMR, was observed.