Synthesis of Bis (tricyclo [4.3.0.12, 5] dec-7-ene-3-yl) ether, a candidate for lubricating oil and a high viscous blending component based on H3PMo12O40·30H2O as a solid acid catalyst

Bis (tricyclo [4.3.0.12, 5] dec-7-ene-3-yl) ether (BTDE), which is suitable starting substance for lubricating oil and a high viscous blending component, has been synthesized from dicyclopentadiene (DCPD) and heteropolyacid as a catalyst. The method made a solution of the problems of a low yield and a production of a lot of wasted sulfuric acid came from a previous preparation of BTDE, in which BTDE was prepared from DCPD and sulfuric acid. When H3PMo12O40·30H2O was used as a solid acid catalyst, BTDE was ob tainable in good yield (63% isolated yield), which is two times scale in comparison with that obtained from the previous method. The sequence of an activity of the catalysts used here is as follows, H3PMo12O40·30H2O=H4SiW12O40·30H2O<H3PMo12O40·30H2O<H9PV6Mo6O40·30H2O<FeCl3·6H2O<CH3C6H4SO3H·H2O<25%H2SO4. Usage of ethers such as 1, 2-dimethoxyethane, 1, 4-dioxane, and methylisobutyl ketone as a solvent, gave a high yield of BTDE. On the other hand, using of methanol, acetonitrile, and water as a reaction solvent resulted that the reaction was not completely proceeding.