As oxidising reagents

Figure 10 Sulfur-donor molecules whose C.-T. adducts with I2 or IBr have been used as oxidising reagents towards metal powders...

Organolithium reagents reaction with imidothioesters 114 reaction with isothiocyanates 42 reaction with non enethiolizable dithioesters 98 Orthotrithioesters 79 cleavage of 79 reaction with ketones 137 Oxathiane Eliel reagent 19 Oxaziridines as oxidising reagents 27 Oxiranes... 

The same study was done in molten chloride, using AICI3 as oxidising reagent. The occurring reaction is described by the equilibrium in Equation 6.3.2 ... 

Again we see that an alkene isomerisation reaction has taken place. Another important, useful reagent applied in this field is also pictured in Figure 15.7, viz. the use of benzoquinone as the re-oxidant for palladium. Quinone takes the role of dioxygen as oxidising agent. It is very efficient and both quinone and hydroquinone are inert towards many substrates. Furthermore, no water is formed, as is the case when dioxygen is used. 

The earliest catalytic application of C-H bond activation and functionalisation is that of methane using platinum chlorides as the catalyst and oxidising reagent. The exchange of hydrogen atoms in arenes with D20 was... 

Redox titration using potassium permanganate as the oxidising reagent and self-indicator. 

The oxidation step is usually carried out in situ and is illustrated by the conversion of hex-l-ene into hexan-l-ol (Expt 5.44) trimethylamine ZV-oxide has been suggested as a safer alternative oxidising reagent.65 The g.l.c. analysis of the... 

Fenton s reagent A mixture of H202 and FeS04. Used as an oxidising reagent, e g. to hydroxylate... 

Alkylation solves the awkward problem of how to make aryl ketones of the pattern 151, awkward because the Friedel-Crafts reaction doesn t work with this substitution pattern. Alkylation of a nitroalkane with the benzylic halide 149 does work well and the product 150 can be oxidised to the ketone32151. Reactions with aldehydes work even with masked aldehydes33 like dihydropyran to give 154 and hence the ketone 155 with a 1,2-substitution pattern after hydrolysis.34 More vigorous conditions give nitroalkenes 145 from aldehydes and these will be very useful later as a2 reagents. 

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