Process for reducing 5-(2-thenylidene) hydantoin to 5-(2-thenyl)

Details Process for reducing 5-(2-thenylidene) hydantoin to 5-(2-thenyl) Process for reducing 5-(2-thenylidene) hydantoin to 5-(2-thenyl)

1993-02-08

1994-07-26

Higel, Floyd D.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D40906, C07D23374

Patent

active

053328299

ABSTRACT:
Preparation process for 5-(2-thenyl) hydantoin in which 5-(2-thenylidene) hydantoin is reacted in acetic acid with a phosphorous compound selected from the group consisting of red phosphorus and phosphonic acid, in the presence of a catalytic amount of an iodine compound selected from the group consisting of iodine and hydroiodic acid.

REFERENCES:
patent: 2729648 (1956-01-01), Rorig
patent: 4293563 (1981-10-01), Jamieson et al.
patent: 4650876 (1987-03-01), Mirviss
Organic Syntheses, Collective vol. 2, 1943, New York, US; pp. 489-494, H. B. Gillespie et al.: 'dl-beta Phenylalanine (Alanine, Beta-phenyl-dl-).
Chemical Abstracts, vol. 33, No. 5, Mar. 10, 1939; Columbus, Ohio, US; G. Barger et al. "Synthesis of beta-2-thienylalanine and beta-2-thienylalanine." (abrege) & Journal of Chemical Society. 1938, pp. 2100-2104.
Fieser et al, "Reagents for Organic Synthesis", vol. 1, pp. 863-864 (1967).

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