Method for preparing 3(4),8(9)-bisformyltricyclo[5.2.1.02,6]decane

A method of preparing 3(4),8(9)-bisformyltricyclo[5.2.1.02,6]decane, the method comprising the steps of:

• performing a primary hydroformylation reaction while adding dicyclopentadiene dropwise to a reactor having a first temperature and a first pressure in the presence of a catalyst composition including a rhodium-containing catalyst compound and an organophosphorus compound;
• and
• performing a secondary hydroformylation reaction under a second temperature and a second pressure by increasing at least one of the pressure and the temperature of the reactor, after completing the primary hydroformylation reaction
• wherein the primary and secondary hydroformylation reactions are performed under a mixed gas atmosphere of hydrogen and carbon monoxide,
• wherein the dropwise addition of dicyclopentadiene is performed such that the number of moles of dicyclopentadiene introduced per minute with respect to 1 mmol of the rhodium atom in the catalyst composition is 10 mmol to 10000 mmol, and
• wherein the rhodium-containing catalyst compound is used in an amount of 1 ppm to 50 ppm in terms of rhodium, based on the total weight of the dicyclopentadiene.