Regioselective Synthesis of 2-(Aryloxythio)benzoates by the First [3+3] Cyclizations of 3-Aryloxythio-1-silyloxybuta-1,3-dienes with 3-Alkoxy-2-en-1-ones - Iqbal, Inam; Imran, Muhammad; Villinger, Alexander; Langer, Peter (Synthesis, 2009)