Jm. Aguirre et al., Structure and stereochemistry of cyclodimers obtained by acid treatment oftrans-stilbenes and of N-1,2-diarylethylamides, J CHEM S P1, (10), 1999, pp. 1353-1358
The reaction of trans-stilbenes and N-1,2-diarylethylamides with ethyl poly
phosphate affords indanes and tetralins with three stereogenic centres. The
structural and configurational assignment of the cyclodimers is based main
ly on the NMR and MS data. A possible transition state for the reaction is
discussed.