- Oxidation of alkynes in aqueous media catalyzed by diphenyl diselenide
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In this communication we propose a convenient methodology to effect the oxidation of alkynes using ammonium persulfate and diphenyl diselenide as catalyst. The reactions effected in aqueous media lead to 1,2-unprotected dicarbonyl derivatives or to hemiacetals starting from terminal alkynes.
- Santoro, Stefano,Battistelli, Benedetta,Gjoka, Blerina,Si, Chun-Wing Steven,Testaferri, Lorenzo,Tiecco, Marcello,Santi, Claudio
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scheme or table
p. 1402 - 1406
(2010/07/14)
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- A Highly Efficient Ruthenium-Catalyzed Rearrangement of α,β-Epoxyketones to 1,2-Diketones
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TpRuPPh3(CH3CN)2PF6 catalyzed the efficient rearrangement of α,β-epoxyketones to 1,2-diketones. Unlike a previously reported iron catalyst, the reaction in this case is applicable not only to 1,2-disubstituted epoxides but also to mono- and trisubstituted epoxides and tolerates oxygen functionalities. The sterically crowded and highly basic tris(1-pyrazolyl)borate (Tp) ligand of the ruthenium catalyst might account for its high selectivity toward 1,2-diketone rather than 1,3-diketone.
- Chang, Chia-Lung,Kumar, Manyam Praveen,Liu, Rai-Shung
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p. 2793 - 2796
(2007/10/03)
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