Tin complexes of indoline-2-carboxylic acids and esters prepared

Details Tin complexes of indoline-2-carboxylic acids and esters prepared Tin complexes of indoline-2-carboxylic acids and esters prepared

1983-02-03

1985-03-19

Hollrah, Glennon H.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548508, C07D20918

Patent

active

045060770

ABSTRACT:
Disclosed herein is a process for obtaining indoline-2-carboxylic acid ester tin complexes directly from o-nitropyruvic acids using metallic tin and dry hydrogen chloride gas in a lower alkanol solvent, at atmospheric pressures.

REFERENCES:
W. J. Houlihan, ed., Indoles, Part One, pp. 396-399 (Wiley Interscience, New York, 1972).
Nolande, et al., "Ethyl Indole-2-Carboxylate", Organic Synthesis, vol. 43, pp. 40-45 (J. Wiley & Sons, New York, 1963).
Robinson, B., "The Reduction of Indoles and Related Compounds", Chem. Reviews, 69, 785, 785-7 (1969).
Elderfield, R. C., ed., Heterocyclic Compounds, vol. 3, pp. 18-22 and 46-51 (John Wiley & Sons, Inc., New York, 1952).
Corey et al., "Studies in Asymmetric Synthesis of .alpha.-amino Acids", J. Am. Chem. Soc., 92, 2476, 2480 (1970).
Hudson et al., "The Synthesis and Chemistry of DL-indoline-2-carboxylic Acid", Aust. J. Chem., 20, 1935-1941 (1967).

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