Process For Extraction Of Peptides And Its Application In Liquid Phase Peptide Synthesis
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United States of America Patent
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Issued Date -
Jul 31, 2014
app pub date -
Jun 14, 2012
filing date -
Jun 16, 2011
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Abandoned
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Abstract
A process for extraction of a peptide from a reaction mixture resulting from a peptide coupling reaction, the reaction mixture containing the peptide and a polar aprotic solvent selected from the group consisting of N,N-dimethylformamide, N,N-dimethylacetamide and N-methyl-2-pyrrolidone, whereby the process includes a step a) and a step b): step a) including the addition of a component a1) and a component a2), whereby component a1) is 2-methyltetrahydrofuran and component a2) is water, to the reaction mixture, so that a biphasic system with an organic layer and an aqueous layer is obtained; step b) including the subsequent separation of the organic layer containing the peptide from the aqueous layer. In an embodiment, a combination of 2-methyltetrahydrofuran and an organic solvent 1 selected from the group consisting of n-heptane, toluene, ethylacetate, isopropylacetate, acetonitrile and tetrahydrofuran is used for the process for extraction. The extraction step is preferably used in a process for preparation of a peptide in liquid phase.
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