Following his abandonment of Togha Temur, Hasan Buzurg recognized Jahan Temür, a grandson of Gaykhatu, as Ilkhan near Hamadan. The conflict with the Chobanids again boiled over, and Hasan Buzurg and Jahan Temur met Hassan Kuchak and his new puppet Suleiman Khan in battle on the Jaghatu. There Hasan Buzurg was defeated on June 26, 1340. He fled to Baghdad; following which he deposed Jahan Temür. With the Chobanids continuing to press him, Hasan Buzurg this time turned to Mamluk Sultanate. He promised Baghdad and Diyar Bakr in return of Mamluk military assistance and capture of Azerbaijan for himself. In 1341, Sutayid Barhashin (son of Hajji Taghay) and Ibrahimshah (nephew of Hajji Taghay) was sent to Aleppo, court of al-Nasir as emissaries. The alliance was a success at first but was later broken thanks to cunning of Hasan Kuchek, who instructed Artuqid ruler of Mardin al-Malik as-Salih to write a letter to Mamluk sultan on alleged Jalayirid truce with Chobanids, advising not to aid Hasan Buzurg. In return, al-Malik was promised that his son-in-law Ibrahim Shah Sutayid would be granted Diyar Bakr instead of pro-Jalayirid Hajji Taghay.