Oxidative cleavage of aromatic ring

LiP catalyze several oxidations in the side chains of lignin and related compounds [26] by one-electron abstraction to form reactive radicals [27]. Also the cleavage of aromatic ring structures has been reported [28]. The role of LiP in ligninolysis could be the further transformation of lignin fragments, which are initially released by MnP. 

Preliminary chemical oxidation of aromatic hydrocarbons by H2O2 or ozone will improve the biodegradability of these hazardous substances because of the cleavage of aromatic rings. 

Tetracyanoethylene oxide [3189-43-3] (8), oxiranetetracarbonitnle, is the most notable member of the class of oxacyanocarbons (57). It is made by treating TCNE with hydrogen peroxide in acetonitrile. In reactions unprecedented for olefin oxides, it adds to olefins to form 2,2,5,5-tetracyanotetrahydrofuran [3041-31-4] in the case of ethylene, acetylenes, and aromatic hydrocarbons via cleavage of the ring C—C bond. The benzene adduct (9) is 3t ,7t -dihydro-l,l,3,3-phthalantetracarbonitrile [3041-36-9], C22HgN O. 

Oxidative cleavage of alkenes, terminal alkynes, or aromatic rings... 

Scheme 4.1 Oxidative cleavage of an electron-rich aromatic ring was a key component of Woodward s proposal for a biogenesis of the Strychnos alkaloids and a key step in his subsequent synthesis of strychnine...

The typical metabolic reactions of pyrethroids are hydrolysis of an ester linkage and oxidation of an alkyl group or an aromatic ring in either acid or alcohol moiety, as shown in Fig. 6. The oxidative cleavage of the C=C bond of the prop-l-enyl... 

On the other hand, aromatic nitro compounds having either lowest (n,7t )-or (7r,7i )-triplets are able to induce oxidative ring cleavage of aromatic methoxy compounds 65-67) a. typical example is given below. 

OXIDATIVE CLEAVAGE OF AN AROMATIC RING cIs,cis-MONOMETHYL HUCONATE FROM 1,2-DIHYDR0XYBEN2ENE (2,4-Hexadienedioic acid, mononethyl ester, (Z,Z)-)... 

OXIDATIVE CLEAVAGE OF AN AROMATIC RING- cis,cis-MONOMETHYL MUCONATE FROM 1,2-DIHYDROXYBENZENE... 

Oxidative Cleavage of Double Bonds and Aromatic Rings Oxo-de-alkylidene-bisubstitution, etc. 

Oxidative cleavage of olefins, terminal alkynes, or aromatic rings 9-11 Oxidation of aromatic side chains 9-21 Oxidation of amines 9-22 Oxidation of primary alcohols or ethers... 

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