Process for the preparation of indoline

Details Process for the preparation of indoline Process for the preparation of indoline

1987-07-09

1989-05-23

Ceperley, Mary E.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D20908

Patent

active

048332550

ABSTRACT:
A process for the preparation of indoline without substantial formation of indole, comprises passing 2-(2-aminophenyl)ethanol, in a vapor phase and admixed with a carrier gas, at a temperature of from about 240.degree. to about 260.degree. C. over at least a catalytic amount of a metal silicate or aluminosilicate containing alkaline earth metal or rare earth metal ions. The carrier gas can be water in the form of steam. The passage of 2-(2-aminophenyl)ethanol over the catalyst can be periodically terminated and the catalyst reactivatd by passing a mixture of air and nitrogen over the catalyst at a temperature of from about 300.degree. to about 550.degree. C., after which the passage of 2-(2-aminophenyl)ethanol and carrier gas can be resumed.

REFERENCES:
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Kh. Minachev, Chem. Abstracts, vol. 81, No. 168887r, (1974), Catalytic Activity of Rare Earth Oxides.
H. Bremer et al., Chem. Abstracts, vol. 75, No. 80699w, (1971), Relation Among Surface-Chemical, Structural and Catalytic Properties of Roasted Magnesium Oxide-Silicon Dioxide Catalysts.
J. Bakke et al., Acta Chem. Scand. B28, (1974), 393-398.
Linde Molecular Sieves, Catalyst Bulletin, Union Carbride, N.Y.
Bull. Soc. Chim Fr. 1931, 49, 3-7.
Chemical Abstracts, vol. 88, No. 104880(1978).
S. Bernal et al., J. Catalysis 66, 184-190(1980).
Advanced Inorganic Chemistry, F. Albert Cotton et al., pp. 386-392.
Abstract of Japanese Kokai No. 52-108969, Dec. 9, 1977.

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