Process for preparing an .alpha.-amino acid, the corresponding e

Details Process for preparing an .alpha.-amino acid, the corresponding e Process for preparing an .alpha.-amino acid, the corresponding e

1992-08-12

1994-08-09

Dees, Jose G.

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

Organic compounds

Carboxylic acids and salts thereof

562443, 562507, 562553, 562575, 560 19, 560 38, 560 39, 560 40, 560 41, 564134, 564135, 564136, C07C22900

Patent

active

053368053

ABSTRACT:
Process for preparing an a-amino acid having the general formula (1) of ##STR1## where R represents an aryl group or a substituted aryl, cycloalkyl or alkyl group, in which process glyoxylic acid, or a precursor or derivative thereof, is contacted in the presence of sulphamic acid with an unsaturated compound chosen from the group of aromatics, cycloalkenes and alkenes. By applying the process higher efficiencies are obtained.
The acid obtained as reaction product can be esterified and amidated without prior isolation.

REFERENCES:
patent: 3073821 (1963-01-01), Johl et al.
patent: 4175206 (1979-11-01), Senuma et al.
patent: 4205185 (1980-05-01), Elton et al.
patent: 4233456 (1980-11-01), Schmand et al.
patent: 4281180 (1981-07-01), Umezawa et al.
Cohen-adad, "Sulfamic Acids". ca90(20):154219y/DE 2827553. Jan. 4, 1979, abstract only.

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