Process for the preparation of aspartylphenylalanine methyl ester from N-formylaspartylphenylalanine methyl ester
申请人:DSM N.V.
公开号:EP0294860A1
公开(公告)日:1988-12-14
The invention relates to a process for the preparation of aspartylphenylalanine methyl ester from N-formylaspartylalanine methyl ester by treatment with an acid, characterized in that N-formylaspartylalanine methyl ester is treated at 30-60◊C with at least 0.5 molar equivalent oxalic acid per mole of N-formyl-aspartylphenylalanine methyl ester in a solvent mixture in which N-formylaspartylphenylalanine methyl ester dissolves well and in which the oxalic acid salt of aspartylphenylalanine methyl ester is poorly soluble, after which the oxalic acid salt of aspartylphenylalanine methyl ester is removed by filtration, dissolved in water and subsequently neutralized with the aid of an inorganic base with formation of free aspartylphenylalanine methyl ester.
作者:Robert H. Mazur、James M. Schlatter、Arthur H. Goldkamp
DOI:10.1021/ja01038a046
日期:1969.5
Synthesis of β-lactam peptidomimetics through Ugi MCR: first application of chiral Nβ-Fmoc amino alkyl isonitriles in MCRs
作者:T.M. Vishwanatha、N. Narendra、Vommina V. Sureshbabu
DOI:10.1016/j.tetlet.2011.08.090
日期:2011.10
Chiral N-beta-Fmoc amino alkyl isonitriles were employed in Ugi multi component reactions (Ugi 4C-3CR) to obtain functionalized beta-lactam peptidomimetics with L-aspartic acid alpha-methyl ester/peptide ester and organic aldehydes. The reactions were carried out in MeOH. Thirteen Ugi products have been prepared in good to moderate yields with good diastereoselectivities. (C) 2011 Elsevier Ltd. All rights reserved.