N-Tosylated phenylalanine derivatives in benzene in the presence of su
lfuric acid afforded 2-arylnaphthalene derivatives in moderate yields.
The reaction might proceed via the corresponding decarbonylated N-tos
ylimine derivatives. Aldol type reaction of N-tosylimines followed by
intramolecular Friedel-Crafts reaction and elimination of p-toluenesul
fonamide gave 2-arylnaphthalenes. (C) 1998 Elsevier Science Ltd. All r
ights reserved.