The present invention is related to processes for preparing chiral substituted pyrazolyl pyrrolo[2,3-d]pyrimidines of Formula III, and related synthetic intermediate compounds. The chiral substituted pyrazolyl pyrrolo[2,3-d]pyrimidines are useful as inhibitors of the Janus Kinase family of protein tyrosine kinases (JAKs) for treatment of inflammatory diseases, myeloproliferative disorders, and other diseases.本發明係關於製備式III對掌性取代之吡唑基吡咯并[2,3-d]嘧啶類及相關合成中間化合物之方法。此對掌性取代之吡唑基吡咯并[2,3-d]嘧啶類可作為蛋白質酪胺酸激酶(JAK)之Janus激酶族群之抑制劑用於治療炎性疾病、骨髓增生病症及其他疾病。