Page 1. Tetrahedron Letters,Vol.29,No.l6,pp 1967-1970,1988 0040-4039/88 $3.00 + .OO Printed in Great Britain Pergamon Press plc ... Joong-Kwon Choi; Young-Kil Chang, Sung Yeap Hong Korea Research Institute of Chemical Technology P. 0. Box 9, Daedeogdanji, Daejeon, KOREA ... On the basis of recent report about obtaining an unsaturated carboxylic acid from an a- phenylselenoaldehyde with excess hydrogen peroxide by Choi and Hart! ...