A Facile Synthesis of 4-Aryl-5-alkoxycarbonyl- 6-hydroxy-6-methyl-4,5,6,7-tetrahydro- 3-hydroxy-2-(pyridin-2-yl)indazoles and Their NMR Characterizations
作者:Yeon Tae Jeong、Shanmugasundaram Amirthaganesan、Gopalakrishnan Aridoss、Young Hwan Park、Jong Su Kim、Se Mo Son
DOI:10.3987/com-07-11231
日期:——
Reaction of dialkyl 2-aryl-4-hydroxy-4-methyl-6-oxocyclohexane-1,3-dicarboxylates with aliphatic amines
作者:V. L. Gein、N. V. Nosova、A. S. Prusakova、M. I. Vakhrin、A. P. Kriven’ko
DOI:10.1134/s1070363208120116
日期:2008.12
Benzylamine, phenethylamine, and homoveratrylamine reacted with dialkyl 2-aryl-4-hydroxy-4-methyl-6-oxocyclohexane-1,3-dicarboxylates at the endocyclic carbonyl group with conservation of the enolic hydroxy group to give dialkyl 4-alkylamino-2-aryl-6-hydroxy-6-methylcyclohex-3-ene-1,3-dicarboxylates. The reaction of dimethyl 4-hydroxy-4-methyl-6-oxo-2-phenylcyclohexane-1,3-dicarboxylate with tryptamine was accompanied by dehydration with formation of dimethyl 4-[2-(1H-indol-3-yl)ethylamino]-6-methyl-2-phenylcyclohexa-3,5-diene-1,3-dicarboxylate, presumably due to basic properties of the indole nitrogen atom.
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作者:V. L. Gein、N. V. Gein、É. V. Voronina、A. P. Kriven'ko