The structure of the products obtained by oxidative dimerization of tetrahydroindazolones was established as being N (1)-C (3a') dimers. In one case a C (3a)-C (3a') dimer was also isolated, but N-N'-Linked dimers were never found, contrary to a previous report in the literature. A complete 13-carbon nmr study of the monomers and their fixed methylated derivatives was performed to determine the most abundant tautomer in each case, since ...
[Coqueret, Xavier; Bourelle-Wargnier, Francoise; Chuche, Josselin; Toupet, Loic Journal of the Chemical Society, Chemical Communications, 1983 , # 20 p. 1144 - 1145]