ChemInform Abstract: Two‐Step Regioselective Synthesis of 3‐(Sulfonylamino)imidazo[1, 2‐a]pyrimidines from 2‐Aminopyrimidines and N‐(2, 2‐Dichloro‐2‐phenylethylidene)arensulfonamides. Issue 13 (March 2015)