This is brominated with N-bromosuccinimide, and the intermediate is then dehydrobrominated with ethereal pyridine to give 1,4-bis (dicyanomethylene) cyclohexadiene. Example 2 states that both dicyanomethylene-cyclohexane and -cyclohexadiene may be hydrolysed, by sulphuric acid or sodium hydroxide ...
For this purpose, this 2-hydroxy-β-ionone is conveniently reacted with an enol acylate in the presence of one of the aforementioned acids; for example dissolved in (an excess of) acetone enol acetate, the solution is treated with a catalytic amount of p-toluenesulphonic acid and the mixture...
hydrolysing to the 4-phenyl-1-carboxycyclohexanol, which is reacted with methyl lithium to form 4-phenyl-1-acetylcyclohexanol or reacting 4-phenylcyclohexanone with acetylene and sodamide in liquid ammonia and oxidizing the product with mercuric sulphate in sulphuric acid to 4-phenyl-1-acetyl cycl...
hydrolysing to the 4-phenyl-1-carboxycyclohexanol, which is reacted with methyl lithium to form 4-phenyl-1-acetylcyclohexanol or reacting 4-phenylcyclohexanone with acetylene and sodamide in liquid ammonia and oxidizing the product with mercuric sulphate in sulphuric acid to 4-phenyl-1-acetyl cycl...
hydrolysing to the 4-phenyl-1-carboxycyclohexanol, which is reacted with methyl lithium to form 4-phenyl-1-acetylcyclohexanol or reacting 4-phenylcyclohexanone with acetylene and sodamide in liquid ammonia and oxidizing the product with mercuric sulphate in sulphuric acid to 4-phenyl-1-acetyl cycl...
hydrolysing to the 4-phenyl-1-carboxycyclohexanol, which is reacted with methyl lithium to form 4-phenyl-1-acetylcyclohexanol or reacting 4-phenylcyclohexanone with acetylene and sodamide in liquid ammonia and oxidizing the product with mercuric sulphate in sulphuric acid to 4-phenyl-1-acetyl cycl...