Manganic acetate oxidations

Such a pre-equilibrium closely parallels that suggested by Dewar et for the manganic acetate oxidations of several aromatic ethers and amines (p. 405). Other features of the reaction are a p value of —0.7 and identical activation energies of 25.3 kcal.mole for oxidation of toluene, ethylbenzene, cumene, diphenylmethane and triphenylmethane. 

Kooyman et a/.232-234 showed that no direct reaction between the arene and Mn(IIl) occurred in the manganic acetate oxidation of benzene, chlorobenzene, and toluene in acetic acid. Products were satisfactorily explained by the participation of carboxymethyl radicals as intermediates analogous to those formed in the manganic acetate oxidation of olefins [see Section II.B.3.a]. Substituted... 

Nambudiry, M. E. N., and G. S. Krishna Rao Studies in Terpenoids Part XXXVI. Manganic Acetate Oxidation of Camphene, Longifolene and 3-Pinene. Indian J. Chem. 13,633(1975). 

The present research was focused on the study of acetaldehyde oxidation rising air with aqueous mangan acetate catalyst in mechanically stirred tank reactor. 

Cremonesi P, EL Cavalieri, EG Rogan (1989) One-electron oxidation of 6-substituted benzo(a)pyrenes by manganic acetate. A model for metabolic activation. J Org Chem 54 3561-3570. 

Commercially available Mn(OAc)3 2H20 has been used for most oxidative cyclizations. This reagent can also be prepared easily from potassium permanganate and manganous acetate in acetic acid [1], Anhydrous Mn(OAc)3 is slightly more reactive than the dihydrate. Reaction times with the anhydrous reagent are usually somewhat shorter but the yields of products are usually comparable. Both tri-fluoroacetic acid and potassium or sodium acetate have been used with Mn(OAc)3. 

ALLYLIC OXIDATION Manganic acetate. Mercuric acetate. Selenium dioxide. 

Manganic acetate (manganese triacetate), Mn(OCOCH3)3, is prepared by refluxing a solution of manganese acetate tetrahydrate in acetic acid with potassium permanganate [S03]. This oxidant hydroxylates ben-zylic methylene groups [416] and forms lactones from terminal alkenes [803, 804] (see equation 88). 

The oxidation of thebaine with manganic acetate first gives [xvi], which on hydrolysis with 20 per cent, hydrochloric acid affords after three minutes at 100° C. the dihydroxyketone [xvrr], and 14-hydroxy-codeinone [xvm] after twenty minutes [98]. The 14-substituted codeinones are discussed in Chapter XVIII. 

Hydroxycodeinono has also been prepared by the oxidation of thebaine with sodium diohromate in aqueous acetic acid or sulphuric aoid [3-5, 10-11], Tho oxidation of thobaino with manganic acetate gives 8- (or J4-) aootyl- 8 14-diliydroxydihydrothobaino [vi], which can... 

Dihydrofumnes. Dihydrofuranes are obtained in fair to high yield by reaction of readily enolizable ketones (/3-diketones, /3-keto esters) with olefins in the presence of 2 eq. of manganic acetate. The reaction is considered to involve generation and oxidation of free radicals. 

Manganic acetate. S-(2-Methoxyalkyl)N,N-dimethyldithiocatbamate. 1,3-Pro-panedithiol. Silver oxide. 

Manganosite. See Manganese oxide (ous) Manganous acetate. See Manganese acetate (ous)... 

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