 when xe0x00x00Xxe0x00x00Axe0x00x00Bxe0x00x00 is xe0x00x00CH0xe0x00x00CHRXxe0x00x00C(xe0x00x00O)xe0x00x00NR0xe0x00x00, the amidoethyl linkage may be prepared by the reaction of a suitably substituted arene