The present application provides processes for preparing (R)-4-(3-((S)-1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-5-c hloro-2-ethoxy-6-fluorophenyl)pyrrolidin-2-one, which is useful as an inhibitor phosphoinositide 3-kinase-delta (PI3Kδ), as well as a salt form and intermediates related thereto.本申請案提供了用於製備(R)-4-(3-((S)-1-(4-胺基-3-甲基-1H-吡唑並[3,4-d]嘧啶-1-基)乙基)-5-氯-2-乙氧基-6-氟苯基)吡咯啶-2-酮之方法,所述化合物作為磷酸肌醇3-激酶-δ(PI3Kδ)的抑制劑是有用的,並且提供了與其相關的鹽形式和中間體。