Methyl Ester of 1-(4-Methoxyphenyl)indole-3-carboxylic Acid (1b) was obtained analogously in
75% yield from enamine 2b [16] as brown crystals; mp 123-125°C (toluene–hexane). The parameters of the
1H NMR, 13C NMR, and mass spectra for the sample obtained of indole 1b were identical to the data reported by
Belinna et al. [19].
Methyl Ester of 1-Dimethylaminoindole-3-carboxylic Acid (1c) was obtained analogously in
77% yield from enamine 2c [17] as a brown oil. The parameters of the 1H NMR, 13C NMR, and mass spectra for
the sample obtained of indole 1c were identical to the data reported by Melkonyan et al. [17].
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