Napthalene preparation

Fig (IS) Tetralone (123) is prepared from 2,7-dim ethoxy napthalene (120) using the standard organic reactions. It is caiboxymethylated with dimethylcarbonate. The resulting compound (124) on subjection to Michael condensation yeilds tricyclic ketone (125) which on methylation followed by thioketalisation produces (128). This on desulfurisation with Raney nickel is converted to (129). 

Benzo-quinone.—Benzoquinone, or more commonly, simply quinone, is the most common and important of the quinones derived from benzene. Other important quinones will be met with when we study derivatives of the more complex hydrocarbons napthalene and anthracene. Benzoquinone is the one we have used as our example in the above discussion and it is the para-di-keto benzene. It was first obtained by the oxidation of quinic acid, which in turn was obtained from quinine, hence its name. It may also be prepared by oxidizing... 

Interest in the use of reducing agents to activate C-F bonds was revived when systems that enabled selective removal of fluoride from perfluorocarbons were discovered in contrast to the complete (destructive) removal of halides as in sodium fusion reactions employed in methods for halogen analysis [31]. (Interest in this latter area has also had resurgence in the search for methods capable of destroying chlorofluorocarbons [32].) The key breakthrough was the report by MacNicol and Robertson that hexakis(thiophenoxy)napthalene can be prepared by treatment of perfluorodecalin with excess sodium phenylthiolate for 10 days at 70°C in DMF [33]. 

Grinding buffer 6% 4-aminosalicylate, 1% tnisopropyl napthalene sulfonate see Note 3), 6% phenol (Phenol [as supplied by Fisons pic, Loughborough, UKl contains 0.1% 8-hydroxyquinoline and is equilibrated against 100 mM Tris-HCl, pH 7.5. Phenol is highly toxic see Note 4 for precautions when handling.), 50 mM Tris-HCl, pH 8.4. This solution should be freshly prepared pnor to use and kept on ice in the dark. 

The -(l-azido-napthalene-S-sulphonyl)-hydrazone derivative of lactose was Mcpared for photoaffinity labelling of a lectin from the conger eel. Aldose N-methyI-A -(4-phcnyI- and -p-substituted phenyl-thiazol-2-yl)hydrazones have been prepared and sqipear to have acyclic sugar residues. Tri- and penta-cyclic derivatives such as 92 and 93 were obtained by condensation of free sugars with A -(4-methylquinolin-2-yl)hydrazine or a tetracyclic heteroaromatic hydrazine, respectively, followed by cyclization (catalyzed by FeQa in EtOH). ... 

Conducting polynaphthalene films can be prepared by the electrochemical polymerization of napthalene (Fig. 22). Satoh et al. [362,372] reported a synthetic scheme which is directly analogous to that for the preparation of polyparaphenylene outlined in the previous section. A nitrobenzene mixture containing 0.1 M copper(ll) chloride, 0,1 M lithium hexafluoroarsenate, and 0.1 M naphthalene a conducting... 

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