218608-97-0Relevant articles and documents
Synthesis method of chiral N-Boc-3-amino-4-aryl-butyric acid
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Paragraph 0032; 0033; 0034; 0035; 0037; 0044, (2017/08/28)
The invention relates to a synthesis method of chiral N-Boc-3-amino-4-aryl-butyric acid. The method is as below: 1, conducting a cross metathesis reaction, an asymmetric conjugate addition reaction and an oxidation reaction on starting materials including an allyl aromatic compound and crotonaldehyde by a continuous reaction one-pot method to synthesize an N-Boc-3-aryl methyl-5-oxo isoxazole intermediate; or conducting an asymmetric conjugate addition reaction and an oxidation reaction on a starting material (E)-4-aryl-2-crotonaldehyde by a continuous reaction one-pot method to synthesize an N-Boc-3-aryl methyl-5-oxo isoxazole intermediate; and 2, subjecting (3R)-N-Boc-3-aryl methyl-5-oxo isoxazole intermediate by high-pressure hydrogenation to directly prepare the chiral N-Boc-3-amino-4-aryl-butyric acid. The synthesis method provided by the invention has the advantages of simple operation, mild reaction conditions, target product yield reaching 60-69%, and ee value of the target product reaching as high as 96%. The synthetic route has industrialization prospect.