A convenient synthesis and structural analysis of novel 4,5,6,7-tetrahydro-1H-indazoles |
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| Authors: | K Murugavel S Amirthaganesan R T Sabapathy Mohan |
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| Institution: | (1) Department of Chemistry, Annamalai University, Annamalainagar, 608 002, India;(2) Division of Image and Information Engineering, Pukyong National University, Busan, South Korea, 608 739;(3) Manonmaniyam Sundaranar University, Tirunelveli, Tamil Nadu, India; |
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| Abstract: | A new series of t-4-aryl-3,c-6-dihydroxy-6-methyl-4,5,6,7-tetrahydro-1H-indazole-r-5-carboxylic acid isopropyl esters has
been synthesized by adopting a conventional method from cyclic β-keto esters. 1H, 13C NMR, and IR spectra for all the compounds were investigated. HMBC, HSQC, COSY, and NOESY spectra of the representative compounds
were studied. The stereochemistry of a six-membered ring of the fused indazoles resembled that of keto esters. From the HMBC
correlations the indazole structure was confirmed as 1H-indazole. |
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