The saga for control of ToAZ, one of the world’s largest ammonia manufacturers, has played out across several jurisdictions pitting mystery Caribbean-linked shareholders against Dmitry Mazepin, a Belarussian oligarch with party political links to Vladimir Putin, who is accused of trying to defraud the business so he can run it into the ground and buy its assets at a knockdown price. The claims are denied. But now, the High Court in Dublin may deliver the final piece of the jigsaw in a decade-long dispute over an alleged corporate raider attack by a minority shareholder on a major Russian chemical plant.…