Process for the preparation of indole derivatives

Details Process for the preparation of indole derivatives Process for the preparation of indole derivatives

1982-11-02

1988-04-05

Ceperley, Mary E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548516, 560125, 562507, C07D20942

Patent

active

047360437

ABSTRACT:
The present invention provides a process for the preparation of 4-hydroxyindole derivatives of the general formula: ##STR1## in which R.sub.1 is a hydrogen atom or an alkyl radical containing up to 6 carbon atoms and R.sub.2 is a hydrogen atom or an alkyl radical containing up to 6 carbon atoms, wherein a compound of the general formula: ##STR2## in which R.sub.2 has the same meaning as above, is reacted with a compound of the general formula:

REFERENCES:
patent: 4075343 (1979-02-01), Kadin
Iida, et al., "Ring Closure of Enaminones . . . ," J. Org. Chem: 44, pp. 1074-1080, (1979).
Tamura, et al., "Reactions of Cyclic-Enamino Ketones. . .", Chem. Pharm. Bull. 24 (6), 1160-1164, (1976).
Yuste, et al., "4 Hydroxy-2-Butenolide . . . ; " J. Org. Chem., (1982), 47, pp. 3665-3668.
Remers, et al., "Synthesis Indoles from 4-Oxo-4,5,6,7-Tetrahydrondoles", J. Org. Chem. 36:1232-40, (1971).
Repke, et al., "Psilocin Analogs, . . . ," J. Heterocyclic Chem., 14; pp. 71-74, (1977).

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