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Spaltung von DL-3,4-Dioxyphenylalanin in die optischen Antipoden

✍ Scribed by K. Vogler; H. Baumgartner

Publisher
John Wiley and Sons
Year
1952
Tongue
German
Weight
336 KB
Volume
35
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

By a new procedure the resolution of DL‐3.4‐dihydroxyphenyl‐alanine into its optical antipodes is effected in good yield by means of fractional crystallization of the cinchonine salts of DL‐β‐(3‐hydroxy‐4‐methoxyphenyl)‐α‐benzoylaminopropionic acid. The well crystallized methylester‐hydrochlorides of D‐ and L‐3.4‐dihydroxyphenyl‐alanine are described. Partially racemized 3.4‐dihydroxyphenylalanine can be separated into its optically active and inactive form by simple crvstallization from water. The optically active form crystallizes first. It follows that the preparation of optically pure L‐ and D‐3.4‐dihydroxyphenylalanine can be carried out without difficulty.

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