3-(4'-Chlorophenyl)-4,6-dimethoxyindoie 1 undergoes reaction with oxal
yl chloride to give the corresponding 2-and 7-glyoxyloyl chloride deri
vatives in differing proportions depending on the solvent and reaction
temperature. The glyoxyloyl chlorides 2 and 3 were convened into the
related glyoxylic acids, and also a wide range of glyoxylic eaters and
amides 4 and 5 respectively. (C) 1996 Elsevier Science Ltd