ChemInform Abstract: An Efficient and Facile Synthesis of 5‐(Thiophene‐2‐carbonyl)‐6‐(trifluoromethyl)‐tetrahydro‐pyrimidin‐2 (1H)‐one and 6‐(Thiophen‐2‐yl)‐4, 5‐dihydropyrimidin‐2(1H)‐one from Same Substrates under Different Conditions. Issue 23 (May 2016)