Diheteroaromatic dianionic oxy-Cope rearrangement route to the synthesis of novel heterocyclic compounds

723-727This is a first instance where the π bonds of the two thiophene rings act as a 1,5-hexadiene system necessary for the oxy-Cope rearrangement. This new reaction termed by us as diheteroaromatic dianionic oxy-Cope rearrangement is used for the synthesis of novel heterocyclic compounds <span style="mso-ansi-language: PT-BR" lang="PT-BR">4,5-diphenyl-3,6-dithia-4,5-dihydro-as-indacene-4,5-diol (2), 25. 26-dioxa-16. 23-dithiaheptacyclo [12.10. 2. 01,14.02,7.08,13.015,19.020,24 ] hexacosa-2(7), 3, 5, 8(13), 9, 11, 15(19), 17, 20(24), 21 decaene (4) and 4.11-dithiapentacyclo [12.7.1. 03,7. 08,12. 018,22 ] docosa-1(21), 3(7), 5, 8(12), 9, 14(22), 15, 17, 19-nonaene-2,13-dione (6), from simple starting materials.