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Facile stereoselective synthesis of γ-substituted γ-amino acids from the corresponding α-amino acids

✍ Scribed by Martin Smrcina; Pavel Majer; Eva Majerová; Tatiana A. Guerassina; Michael A. Eissenstat


Publisher
Elsevier Science
Year
1997
Tongue
French
Weight
459 KB
Volume
53
Category
Article
ISSN
0040-4020

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✦ Synopsis


A lacile slereoselcctive melhod Ior the synthesis of y-substituted, y-mnino acids from of amino acids was developed. The key step of the procedurc is complete reduction of Ihe keto functionality of ot-~unino acyl Meldruln's acid by sodium acetoxyborohydride. The resulting amino alkyl Meldrum's acid undergoes thermal decarboxylative ring closure to a 5-substituted pyrrolidinone which yields Ihe correslxmding y-amino acid after ~sic hydrolysis. The over',dl yield of the procedure ranges ti'om 40 to 65~7,.


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ChemInform Abstract: Facile Stereoselect
✍ M. SMRCINA; P. MAJER; E. MAJEROVA; T. A. GUERASSINA; M. A. EISSENSTAT 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 33 KB 👁 1 views

Facile Stereoselective Synthesis of γ-Substituted γ-Amino Acids from the Corresponding α-Amino Acids. -The mild and short procedure presented is compatible with common side-chain protecting groups, sensitive functionalities and preserves the chirality of the starting α-amino acid.

Stereoselective Synthesis of Some γ- and
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## Abstract (__R__)‐(−)‐2‐Amino‐4‐fluorobutyric acid (4c) (32% ee) and six of its homologues 9 have been synthesized by diastereoselective alkylation (54–72% yield) of (__R__)‐(+)‐camphor‐based glycine ester imines 1 with 1‐bromo‐2‐fluoro‐alkanes 6, at low temperature, followed by deprotection. Sim