Abstract
Investigation of the thermal stability of halogenometalalkoxides obtained by reacting Grignard compounds with esters of oxalic acid and containing an indolyl group, is continued. Despite the aromatic nature of the indolyl radical, the ordinary decomposition of the halogenomagnesiumalkoxides with splitting off of aldehyde (ketone) does not take place at 40‡–110‡ C. This is due to hydrogen bonding between hydrogen on the nitrogen and the alkoxy group. The IR spectra of the esters of N-indolyl- and α-indolylglyoxylic acids synthesized are investigated. The latter are shown to contain a hydrogen bond between the NH group hydrogen and the carbonyl group.
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For Part XVIII see [12].
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Lapkin, I.I., Dormidontov, Y.P. Reactions of halogenometalalkoxides. Chem Heterocycl Compd 3, 678–680 (1967). https://doi.org/10.1007/BF00468343
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DOI: https://doi.org/10.1007/BF00468343