It’s only fair to share… US. 8362279 http://www.google.co.in/patents/US8362279 Inventors Manne Satyanarayana Reddy, Muppa Kishore Kumar, Srinivasan Thirumalai Rajan,Durgadas Shyla Prasad, Original Assignee Msn Laboratories Limited Synthesis of duloxetine is described in detail in EP-A-273 658, EP-A-457 559 and EP-A-650965, starting from 2-acetylthiophene, an aminomethylation with dimethylamine and formaldehyde (Mannich reaction) is carried out in step-A. …