109425-51-6Relevant articles and documents
Preparation method of N - 9 - fluorenylmethoxycarbonyl - N ' - trityl - L - histidine
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Paragraph 0012; 0028; 0030-0032; 0034-0035, (2021/09/21)
The invention relates to the technical field of medical intermediate synthesis, in particular to a synthetic method of N - 9 - fluorenylmethoxycarbonyl - N ' - trityl - L - histidine, which comprises the following steps: taking L - histidine as a raw material and protecting a - amino groups on histidine by using a silane protective agent. A silane protecting substance Nim - trityl histidine is obtained by reaction with triphenylchloromethane, followed by addition of water to the silane protecting group. The silane protecting substance Nim - trityl histidine is reacted with 9 - fluorenylmethoxycarbonyl protecting reagent to give the target product N - 9 - fluorenylmethoxycarbonyl - N ' - trityl - L - histidine. The N - 9 -fluorenylmethoxycarbonyl - N ' - trityl - L - histidine preparation method provided by the invention is simple and convenient to operate, high in yield and low in comprehensive production cost, and is suitable for industrial large-scale production.
DIPHENYLMETHANE COMPOUND
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, (2010/10/19)
Compounds having a diphenylmethane skeleton are superior in broad utility and stability, and are useful as a protecting reagent (anchor) of amino acid and/or peptide in the liquid phase synthesis and the like of a peptide having a C-terminal etc., which are of a carboxamide(-CONHR)-type, and in organic synthetic reaction methods (particularly peptide liquid phase synthetic methods), and may be contained in a kit for peptide liquid phase synthesis.
Efficient procedure for the preparation of oligomer-free N-fmoc amino acids
Nowshuddin, Shaik,Rao,Reddy, A. Ram
experimental part, p. 2022 - 2031 (2009/11/30)
A two-step method is presented for the peptide-free, high-purity, and high-yield synthesis of N-Fmoc amino acids. The first step involves the preparation of stable dicyclohexylammonium-amino acid ionic adduct in acetone. Subsequently, the ionic adducts, on reaction with Fmoc-Nosu under mild alkaline conditions, give dipeptide-free N-Fmoc amino acids. The positive charge of the dicyclohexylammonium counterion in the ionic salt has a longer radius, moderating the nucleophilicity of the carboxylate ion of the amino acid and preventing by-products by arresting the formation of mixed anhydrides, the precursors of oligopeptide impurities.
GLP-2 compounds, formulations, and uses thereof
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, (2008/06/13)
The present invention relates to novel human glucagon-like peptide-2 (GLP-2) peptides and human glucagon-like peptide-2 derivatives which have a protracted profile of action as well as polynucleotide constructs encoding such peptides, vectors and host cells comprising and expressing the polynucleotide, pharmaceutical compositions, uses and methods of treatment.
Application of the Trt and Fmoc Groups for the Protection of Polyfunctional α-Amino Acids
Barlos, Kleomenis,Mamos, Petros,Papaioannou, Dionysios,Patrianakou, Stella,Sanida, Chariklia,Schaefer, Wolfram
, p. 1025 - 1030 (2007/10/02)
Simple methods for the preparation of ditrityl amino acids 3 and their application for the synthesis of the peptides 9-27 are described.Selective detritylation of 3 and of the synthesized ditrityl peptides is achieved with 1percent trifluoroacetic acid in dichloromethane.The resulting Nα-detritylated amino acids 5 were converted into the corresponding fluorenylmethoxycarbonyl amino acids 6 under Schotten-Baumann conditions using fluorenylmethyl chloroformate.