Conclusions
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1.
The reaction of cyclohexene, formaldehyde, and hydrochloric acid at a temperature of 20-30°C leads to the formation of di(trans-2-chlorocyclohexylmethyl)formal.
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2.
3-Hydroxymethylcyclohexene, formed during the dehydrochlorination of di(trans-2-chlorocyclohexylmethyl)formal by the action of alcoholic alkali, followed by methanolysis of dehydrochlorination of trans-1-hydroxymethyl-2-chlorocyclohexane by the action of potassium acetate, is converted into 3-chloro(bromo)methylcyclohexene via a tosylate, by the action of calcium chloride (sodium bromide) in glycerin.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No, 12, pp. 2805–2809, December, 1987.