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Synthesis 2018; 50(03): 607-616
DOI: 10.1055/s-0036-1590945
DOI: 10.1055/s-0036-1590945
paper
Economical Synthesis of α-Amino Acids from a Novel Family of Easily Available Schiff Bases of Glycine Esters and 2-Hydroxybenzophenone
This work was supported by the Russian Science Foundation (RSF grant 17-73-10016). X-ray studies were supported by the RUDN University Program 5-100.Further Information
Publication History
Received: 07 September 2017
Accepted after revision: 07 October 2017
Publication Date:
09 November 2017 (online)


Abstract
We report a novel, efficient, and easily prepared substrate/precursor family of Schiff bases of various glycine esters with 2-hydroxybenzophenone, and their use for the synthesis of amino acids in quantitative yields. The Michael addition of the substrates to methyl acrylate gave two different types of product (cyclic or chain), depending on the nature of the base. Also, we demonstrated that one of the new substrates could be involved in an asymmetric version of the alkylation reaction (70% ee).
Key words
Schiff bases - amino acids - hydroxybenzophenone - asymmetric alkylation - Michael additionSupporting Information
- Supporting information for this article is available online at https://doi.org/10.1055/s-0036-1590945.
- Supporting Information