The Gulaylar Group, the U.S. real estate development arm of a Turkish jewelry company, is suing General Growth Properties and Thor Equities over a soured $150 million deal to buy the office component of 685 Fifth Avenue. Gulaylar claims that, since the contract of sale was signed last year, GGP and Thor made material changes to the building which lowered its value by as much as $40 million. The company also claims it was assured … [more]