Convenient process for the preparation of chiral or racemic phen

Details Convenient process for the preparation of chiral or racemic phen Convenient process for the preparation of chiral or racemic phen

1993-06-04

1994-11-22

Raymond, Richard L.

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

Organic compounds

Carboxylic acid esters

564142, 564355, C07C20968, C07C27116

Patent

active

053670949

ABSTRACT:
This invention pertains to an improved process for preparing chiral or racemic phenylalaninol (PAO) by hydrogenation of L(+)- or racemic 2-amino-1-phenyl-1,3-propanediol (APPD) in the presence of a strong volatile acid. Furthermore, a more valuable form of PAO such like N-blocked PAO was found to be directly produceable from the hydrogenation mixture without isolation of PAO, when a volatile acid was used as the medium of the hydrogenation reaction.

REFERENCES:
patent: 3084099 (1963-04-01), Hayes et al.
patent: 4994617 (1991-02-01), Aubard et al.

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