- Synthesis of E-α,β-unsaturated ketones with complete stereoselectivity via sequential aldol-type/elimination reactions promoted by samarium diiodide or chromium dichloride
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E-α,β-Unsaturated ketones can be obtained with complete E-selectivity by a sequential reaction of dichloroketones with a variety of aldehydes. This transformation was promoted by SmI2, SmI2 in the presence of FeCl3 or CrCl2. The best results were obtained when CrCl2 was used as the metallating agent. A mechanism based on a successive aldol-type reaction and a β-elimination is proposed to explain these results. Georg Thieme Verlag Stuttgart.
- Concellón, José M.,Rodríguez-Solla, Humberto,Concellón, Carmen,Díaz, Pamela
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p. 837 - 840
(2007/10/03)
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- Spectral properties and photochemical activity of chalcone derivatives
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A relationship is found between spectral-luminescent and photochemical properties for mono-and disubstituted chalcone derivatives R1CO-CH=CHR2 [R1, R2 = Ph, 4-FC6H4, 4-BrC6H4, 2-furyl, 2-thienyl, 4-(PhCONH)C6H4, 4-NH2C6H4, 4-Me2NC6H4].
- Rtishchev,Nosova,Solovskaya,Luk'yashina,Galaktionova,Kudryavtsev
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p. 1272 - 1281
(2007/10/03)
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