Mercuric oxide with dihydrazones

ACID, ETHYL ESTER, 34, S4 Oxidation, by nitric acid, 30, 48 of aldehyde to carboxyl group, 30, 49 of benzil dihydrazone with mercuric oxide, 34, 42... [Pg.59]

One method for the preparation of diphenylacetylene involves oxidation of benzil dihydrazone with mercuric oxide the intermediate diazo compound loses nitrogen as formed to give the hydrocarbon ... [Pg.486]

Dihydrazones of a-diketones, when treated with mercuric oxide at higher temperatures, yield acetylenes [393, 394, 395, 396], Diphenylacet-ylene is obtained by refluxing benzil dihydrazone with mercuric oxide [396] in benzene or by refluxing benzil monohydrazone with mercurous trifluo-roacetate in ether for 2 h (yield 43%) [405], The oxidation of dihydrazones... [Pg.221]

In the preparation of diphenylacetylene from benzil dihydrazone, this derivative is suspended in benzene in a flask fitted with a stirrer and reflux condenser, and mercuric oxide is added in portions at a rate sufficient to maintain gentle refluxing... [Pg.331]

Curtius et ah206 showed that acetylenes can also be prepared by oxidizing vicinal dihydrazones with yellow mercuric oxide. Diphenylacetylene, for example, is thus obtained in 75% yield from benzil dihydrazone.207 In a variant of the Curtius procedure diacetylenes can be prepared in 80-85% yield by oxi-... [Pg.841]

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