Patent ID: 8618295

Claim:
A method for preparing a compound represented by the following formula (VIII), wherein the compound of the formula (VIII) is either a meridional isomer represented by the following formula (IX) or a facial isomer represented by the following formula (X), including a step of reacting IrCl 3 or M 3 IrCl 6 with a base and a compound of the following formula (VI) in water, wherein M is Li, Na or K; and each of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 , independently, is hydrogen, deuterium, alkyl, alkenyl, alkynyl, halogen, alkoxy, alkenoxy, alkynoxy, haloalkyl, haloalkenyl, haloalkynyl, cycloalkyl, cycloalkenyl or aryl; or R x and R x+1 taken together is alkylene, alkenylene, haloalkylene or haloalkenylene, x being an integer of 1 to 7.