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Enhydrazines, 38. - Discrimination between 1,5,6,7-Tetrahydro-4H- and 2,5,6,7-Tetrahydro-4H-indazol-4-ones in the 13C NMR Spectrum
Sutthivaiyakit, Somyote,Sucrow, Wolfgang,Wonnemann, Heinrich,Krueger, Carl
, p. 794 - 801 (2007/10/02)
From the title compounds the isomeric pairs 1a, b, 4a, b, and 5a, b were prepared.The spectroscopic properties of the regioisomers were investigated.Only the 13C NMR signals of the C atoms 3 and 7a are significantly different within a pair and can be used for a reliable assignment.The structure of 1b was assigned by an X-ray analysis.
