87269-98-5Relevant articles and documents
Preparation method of N-[1-(S)-ethoxy carbonyl-3-phenyl propyl]-L-alanine
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Paragraph 0066; 0073; 0075; 0076; 0077; 0081; 0085; 0089, (2018/07/15)
The invention provides a preparation method of N-[1-(S)-ethoxy carbonyl-3-phenyl propyl]-L-alanine. The preparation method comprises the following steps: performing addition reaction on a compound I and a compound II under the action of a first catalyst to obtain an addition product, wherein the first catalyst is selected from a first thiourea compound and/or a urea compound; performing hydrogenation reaction on the addition product to obtain the N-[1-(S)-ethoxy carbonyl-3-phenyl propyl]-L-alanine. The first catalyst (the first thiourea compound and/or the urea compound) can be added to the reaction system, the selectivity of the addition reaction is improved and the separation efficiency of the required product in the addition reaction process is improved, so that the yield of the final product N-[1-(S)-ethoxy carbonyl-3-phenyl propyl]-L-alanine is increased. The method has the advantages of being short in synthesis route, simple in aftertreatment, capable of being applied to industrialized production and the like.
Addition of enantiomerically pure amines to activated olefines II. On the addition to ethyl (E)-4-oxo-4-phenyl-2-butenoate
Knollmüller, Max,Ferencic, Mathias,G?rtner, Peter,Girreser, Ulrich,Klinge, Michael,Gaischin, Larissa,Mereiter, Kurt,Noe, Christian R.
, p. 769 - 782 (2007/10/03)
The addition of (S)-phenethylamine to ethyl (E)-4-oxo-4-phenyl-2-butenoate shows no kinetic selectivity, whereas - according to the b,pl,H-rule the AB-and BB-product are kinetically preferred in the addition of (S)-alanine-isopropylester and -benzylester,