METHOD OF OBTAINING 7,7-DIMETHOXYBICYCLO[2,2,1]-HEPTADIENE-2,5 Russian patent published in 2008 - IPC C07C43/305 C07C41/50 

FIELD: chemistry.

SUBSTANCE: invention pertains to the method of obtaining 7,7-methoxybicyclo[2,2,1]heptadiene-2,5, which is the initial reagent in the synthesis of tetramethoxyethylene, and is a powerful reducing agent and methylating agent. The method involves re-etherification of 7-tetrabutoxynorbornanediene (7-t-BuO-NBD) by methanol in the presence tetrachloromethane and Mo-containing catalyst Mo(CO)₆, with subsequent oxidation of intermediate 7-methoxynorbornanediene by methylhypochlorite, formed in situ from tetrachloromethane and methanol. The reaction is carried out at 80-100°C for 2 hours and molar ratio [Mo(CO)₆]:[t-BuO-NBD]:[CCl₄]:[MeOH]=1:100:100÷200:100÷400.

EFFECT: method allows shortening the duration of the reaction, consumption of toxic reagents, simplification and reduction of expenses on the stage of separating the target product.

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