A Novel Reaction Type Promoted by Aqueous Titanium Trichloride. Synthesis of Allylic Pinacols
Electron-withdrawing substituted carbonyl compounds which are allowed to react with 2 equiv of aqueous titanium trichloride selectively add to the carbonyl carbon atom of α,β-unsaturated aldehydes.Highly functionalized allylic pinacols are obtained in good yields under very simple experimental conditions.The fundamental role played by the titanium(III) ion is discussed.
Clerici, Angelo,Porta, Ombretta
p. 1690 - 1694
(2007/10/02)
A Novel Reaction Type Promoted by Aqueous Titanium Trichloride. Synthesis of Unsymmetrical 1,2-Diols
Electron-withdrawing substituted carbonyl compounds when allowed to react with 2 equiv of aqueous titanium trichloride in the presence of acetone, acetaldehyde, or benzaldehyde afford unsymmetrical 1,2-diols in high yields under very simple experimental conditions.
Clerici, Angelo,Porta, Ombretta
p. 2852 - 2856
(2007/10/02)
MIXED CARBONYL COUPLING INDUCED BY AQUEOUS TITANIUM TRICHLORIDE. SOME COMMENTS ON THE MECHANISM.
Aqueous titanium trichloride promotes reductive dimerization of benzoylcyanide in acetic acid and mixed pinacol reaction in acetone medium.A mechanism is proposed to account for this.
Clerici, Angelo,Porta, Ombretta,Riva, Manuela
p. 1043 - 1046
(2007/10/02)
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