Jan-Feb 1996 A Straightforward Route to 4#-l,4-Benzoxazine-2-carbaldehydes by Swern Oxidation Anne-Sophie Bourlot, Gerald Guillaumet and Jean-Yves Mérour* Laboratoire de Chimie Bioorganique et Analytique, URA CNRS No. 499, Université d'Orléans, BP 6759, 45067 Orléans Cedex 2, France Received May 23, 1995 Swern oxidation of saturated (l,4-benzoxazine-2-yl)-methanols 2 furnished 4//-l,4-benzoxazine-2-carb- aldehydes 3, which possess an a,ß ethylenic ...