ChemInform Abstract: Convenient One‐Pot Synthesis of N3‐Substituted Pyrido[2, 3‐d]‐, Pyrido[3, 4‐d]‐, Pyrido[4, 3‐d]‐pyrimidin‐4(3H)‐ones, and Quinazolin‐4(3H)‐ones Analogues. Issue 42 (1st October 2013)