ChemInform Abstract: Sm(OTf)3 as a Highly Efficient Catalyst for the Synthesis of 2, 3‐Unsaturated O‐and S‐Pyranosides from Glycals and the Temperature‐Dependent Formation of 4‐O‐Acetyl‐6‐deoxy‐2, 3‐unsaturated S‐Pyranosides and 4‐O‐Acetyl‐6‐deoxy‐3‐alkylthio Glycals. Issue 14 (April 2015)