Abstract
Indolenium salts, which readily undergo cleavage in aqueous alkali to give a monosubstituted acetylene and 1,3,3-trimethyl-2-oxindole, are formed when acyl derivatives of the Fischer base are heated with phosphorus oxychloride. Various aryl- and hetarylacetylenes can be conveniently obtained by this method.
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Translated from Khimiya Geterotsiklicheskikh Soedenii, No. 7, pp. 915–918, July, 1987.
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Prizhiyalgovskaya, N.M., Kon'kov, L.I., Tarshits, D.L. et al. Acetylenic fragmentation of acyl derivatives of the Fischer base. Chem Heterocycl Compd 23, 751–754 (1987). https://doi.org/10.1007/BF00475641
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DOI: https://doi.org/10.1007/BF00475641