Reactions of hydroxyl-containing compounds with tert-butyl hydroperoxide in the presence of chromium tetra-tert-butoxide
摘要:
Primary and secondary aliphatic, alkylaromatic, cyclic, and organoelement alcohols are efficiently oxidized by tert-butyl hydroperoxide in the presence of both equimolar and catalytic quantities of chromium tetra-tert-butoxide (D(6)De(6), 20A degrees D). alpha-Diols containing tertiary hydroxyl groups interact with this system via oxidative splitting of the carbon scaffold. The oxidation includes the stages of formation and decomposition of chromium-containing peroxy compounds. Further transformations of the carbonyl compounds depend on the structure of radicals in the molecules.
A new protocol to synthesize 1,4-dihydropyridines by using 3,4,5-trifluorobenzeneboronic acid as a catalyst in ionic liquid: synthesis of novel 4-(3-carboxyl-1H-pyrazol-4-yl)-1,4-dihydropyridines
作者:Radhakrishnan Sridhar、Paramasivan T. Perumal
DOI:10.1016/j.tet.2005.01.008
日期:2005.2
liquid mediated facile synthesis of 4-pyrazolyl 1,4-dihydropyridines at room temperature by the cyclocondensation of ethyl 3-aminocrotonate, pyrazole aldehyde and a β-keto ester is reported. The procedure adopted was found to be eco-benign, facile at room temperature and better than the conventional, [bmim]Cl mediated and InCl3 catalysed, [bmim]Cl mediated 1,4-dihydropyridine syntheses.
Specific features of the reaction of vanadyl acetylacetonate with tert-butyl hydroperoxide
作者:L. P. Stepovik、M. V. Gulenova
DOI:10.1134/s1070363209080143
日期:2009.8
Reaction of vanadyl acetylacetonate with tert-butyl hydroperoxide (benzene, 20 degrees C) at any molar ratio leads to the elimination of ligand and its oxidation mainly to CO2 and acetic acid. At the (acac)(2)VO: t-BuOOH ratio above 1: 10 liberation of oxygen partially in the singlet state takes place.
�ber halogen- und stickstoffhaltige Derivate aliphatischer Carbons�uren, 5. Mitt.: �ber die Gewinnung von ?-Oximinocarbons�ureestern und ihre �berf�hrung in ?-Ketos�uren