35071-52-4

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The invention discloses a method for preparing high-purity chinese juniper methyl alcohol, cyclopentadiene activated reagent after activation with isopropyl bromine instead should be containing various isomers of the isopropyl cyclopentadiene, then in the isomer conversion catalyst under the action of the isomerization reaction to obtain 1 - isopropyl cyclopentadiene; 1 - isopropyl cyclopentadiene and [...] react 1 - isopropyl cyclopentadiene and 4, 4 - [...] 5 - one; 1 - isopropyl cyclopentadiene and 4, 4 - [...] 5 - ketone with triethylamine heating reflux generating ring enlargement reaction to obtain the target product chinese juniper methyl alcohol. The invention raw materials used are cheap and easily obtained, and the step A through the isomer of a hydrocarbon conversion catalyst in use significantly reduces the by-product 2 - isopropyl cyclopentadiene and 5 - isopropyl cyclopentadiene generation, improves the yield of products, and Ru (Ac)3 - ZSM - 5 can be repeatedly used for four times still maintains good catalytic activity; step B by adjusting reaction solution in glacial acetic acid, effectively prevent the emergence of the diketone by-product. (by machine translation)