Method for resolution of D,L-alpha-phenethylamine with D(-)mandelic acid
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United States of America Patent
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Jan 8, 1991
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N/A
app pub date -
Sep 18, 1989
filing date -
Sep 18, 1989
priority date (Note) -
Expired
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Abstract
A process for recovering optically pure D(+)alpha-phenethylamine which comprises addition of the racemic mixture to a water/acid solution, and as a resolving agent, optically active D(-)mandelic acid. An optically pure D(+)alpha-PEA mandelate salt is formed, crystallized out of solution and washed with water. The salt is broken with sodium hydroxide, or a similar base, and the D(+)PEA liberated is extracted with toluene. The D(+) PEA recovered by vacuum distillation is recovered in high yield, shows high enantiomeric purity.
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