A 2- or 4-nitrobenzenesulfonamide is allowed to react with an alkali metal alkoxide to remove a nitrobenzenesulfonyl group to thereby obtain an amine corresponding to the amide. Furthermore, a method for producing an amine derivative by allowing the resulting amine without isolation to react with an activated, substituted oxycarbonyl compound or an activated acyl compound is provided. According to this method, a corresponding free amine and its substituted derivative can be produced easily and industrially advantageously from the 2- or 4-nitrobenzenesulfonamide without using a thiol compound.
Process for producing optically active amino acid derivatives
申请人:Sugawara Masanobu
公开号:US20050143586A1
公开(公告)日:2005-06-30
An optically active amino acid derivative is produced by N-protecting an optically active 3-haloalanine derivative followed by cyclization, or cyclizing this derivative followed by N-protection to thereby give an optically active N-protected-aziridine-2-carboxylic acid derivative which is protected by a benzenesulfonyl group substituted by nitro at the 2- and/or 4-positions and then treating this product with an organic metal reagent, or by N-protecting an optically active 3-haloalanine derivative to thereby give N-protected-aziridine-2-carboxylic acid which is protected by a benzenesulfonyl group substituted by nitro at the 2- and/or 4-positions and then treating this product with an organic metal reagent. According to this process, natural and unnatural optically active amino acids can be produced from inexpensive materials by using simple procedures.
PROCESSES FOR PREPARING OPTICALLY ACTIVE AMINO ACID DERIVATIVES
申请人:Kaneka Corporation
公开号:EP1179530A1
公开(公告)日:2002-02-13
An optically active amino acid derivative is produced by N-protecting an optically active 3-haloalanine derivative followed by cyclization, or cyclizing this derivative followed by N-protection to thereby give an optically active N-protected-aziridine-2-carboxylic acid derivative which is protected by a benzenesulfonyl group substituted by nitro at the 2- and/or 4-positions and then treating this product with an organic metal reagent, or by N-protecting an optically active 3-haloalanine derivative to thereby give N-protected-aziridine-2-carboxylic acid which is protected by a benzenesulfonyl group substituted by nitro at the 2- and/or 4-positions and then treating this product with an organic metal reagent.
According to this process, natural and unnatural optically active amino acids can be produced from inexpensive materials by using simple procedures.
通过对具有光学活性的 3-卤丙氨酸衍生物进行 N 保护,然后进行环化,或对该衍生物进行环化,然后进行 N 保护,从而得到具有光学活性的 N 保护-氮丙啶-2-羧酸衍生物,该衍生物在 2-和/或 4-位受到被硝基取代的苯磺酰基的保护,然后用有机金属试剂处理该产物、或对具有光学活性的 3-卤丙氨酸衍生物进行 N 保护,从而得到 N 保护氮丙啶-2-羧酸,该氮丙啶-2-羧酸在 2-和/或 4-位上受到被硝基取代的苯磺酰基的保护,然后用有机金属试剂处理该产物。
根据这一工艺,可以通过简单的程序从廉价的材料中生产出天然和非天然的光学活性氨基酸。
CYCLIC PEPTIDE COMPOUND HAVING HIGH MEMBRANE PERMEABILITY, AND LIBRARY CONTAINING SAME
申请人:Chugai Seiyaku Kabushiki Kaisha
公开号:EP3636807A1
公开(公告)日:2020-04-15
The present inventors have found that when screening for cyclic peptide compounds that can specifically bind to a target molecule, the use of a library including cyclic peptide compounds having a long side chain in the cyclic portion can improve the hit rate for cyclic peptide compounds that can specifically bind to the target molecule. Meanwhile, the present inventors have found that tryptophan and tyrosine residues, which have conventionally been used in oral low molecular-weight pharmaceuticals and are amino acid residues having an indole skeleton or a hydroxyphenyl group, are not suitable for peptides intended to attain high membrane permeability.