Unprecedented One-Pot Stereoselective Synthesis of Knoevenagel-Type Derivatives via in situ Condensation of N-Methyleniminium Salts of Ethylenethiourea and Ethyleneurea with Active Methylene Reagents - Ranise, Angelo; Cesarini, Sara; Spallarossa, Andrea; Sancassan, Fernando; Bondavalli, Francesco; Bruno, Olga; Schenone, Silvia; Menozzi, Giulia; Fossa, Paola; Mosti, Luisa (Synthesis, 2007)