摘要:
A process for the solid phase synthesis of a peptide having at least one thyptophan residue, wherein said method comprises temporarily protecting the indole ring of said tryptophan residue with a side chain protecting group which is labile to a base wherein said protecting group is removed during cleavage of said peptide from the solid support.
摘要:
Histidine derivatives of formula I are useful inter alia in peptide synthesis. ##STR1## wherein: X represents --CH.sub.2 OCH.sub.2 Ar, in which Ar is a phenyl substituent optionally substituted by one or more halogen, alkoxy, alkyl or nitro groups;Y, which differs from X, represents hydrogen, a protective group capable of inhibiting self coupling during formation of a peptide bond, an amino acid residue, a peptide chain or an antibiotic residue;E represents OH,OM,M representing an alkali metal or ammonium, OR, R representing an alkyl, aryl, aralkyl or alkaryl group, an amino acid residue, a peptide chain or an antibiotic residue;the compound I being optionally in the form of a hydrate or acid salt.In compounds I of especial interest, X represents benzyloxymethyl or p-bromobenzyloxymethyl, Y represents t-butyloxycarbonyl and E represents --OH.
摘要翻译:式I的组氨酸衍生物尤其可用于肽合成。 其中:X表示-CH 2 OCH 2 Ar,其中Ar是任选被一个或多个卤素,烷氧基,烷基或硝基取代的苯基取代基; 与X不同的Y表示氢,能够抑制形成肽键期间的自身偶联的保护基,氨基酸残基,肽链或抗生素残基; E表示代表碱金属或铵的OH,OM,M,OR表示烷基,芳基,芳烷基或烷芳基,氨基酸残基,肽链或抗生素残基; 化合物I任选呈水合物或酸式盐形式。 在特别感兴趣的化合物I中,X表示苄氧基甲基或对溴苄氧基甲基,Y表示叔丁氧基羰基,E表示-OH。
摘要:
The invention relates to a method of modifying a specific lysine residue in a polypeptide comprising at least two lysine residues, said method comprising (a) providing a polypeptide comprising a target lysine residue protected by a first protecting group, and at least one further lysine residue; (b) treating the polypeptide to protect said further lysine residue(s), wherein the protecting group for said further lysine residues is different to the protecting group for the target lysine residue; (c) selectively deprotecting the target lysine residue; and (d) modifying the deprotected lysine residue of (c).
摘要:
The invention relates to a method for homogeneous solution phase peptide synthesis (HSPPS) of a N-terminal peptide fragment PEP-N and a C-terminal peptide fragment C-PEP, with C-PEP carrying a specific diketopiperazine (DKP) comprising C-terminal protecting group, which contains a handle group HG, with HG being connected to the C-terminus of the peptide fragmcnt; thereby this specific DKP comprising C-terminal protecting group can be selectively cleaved from the peptide as a conventionally used C-terminal protecting group. By the use of this DKP and HG comprising C-terminal protecting group, certain process steps in convergent peptide synthesis based on a combination of HSPPS and solid phase peptide synthesis (SPPS) can be avoided. The invention relates further to a method for the preparation of such specifically protected fragment C-PEP by SPPS by using a linker comprising a specific dipeptide and HG for connecting the growing peptide chain to the resin, which linker forms said DKP group, when the peptide fragment C-PEP is cleaved from the supporting resin; and further to the intermediates of the preparation method.
摘要:
An indole group in an amino acid or a peptide can be protected with a group shown by the formula: ##STR1## wherein R.sub.1 and R.sub.5 each is hydrogen, methyl or methoxy; R.sub.2 and R.sub.4 each is hydrogen or methyl; and R.sub.3 is methyl or methoxy, and said group may easily be removed without affecting the amino acid or the peptide to be derived from the protected amino acid or peptide. Thus, the present invention is useful in the synthesis of a peptide containing an indole group.
摘要:
A PROCESS FOR PREPARING PEPTIDES CONTAINING HISTIDINE WHEREIN THE IMIDAZOLE NITROGEN ATOM IS PROTECTED BY A 2,2,2-TRIHALOGENO-N-BENZYLOXYCARBONYLAMINOETHYL GROUP.
摘要:
The invention relates to pyridinone derivatives of general formula (I) as inhibitors of tissue transglutaminase, to methods for producing the pyridinone derivatives, to pharmaceutical compositions containing said pyridinone derivatives and to their use for the prophylaxis and treatment of diseases associated with tissue transglutaminase.
摘要:
[Technical Problem]To provide a method for manufacturing that enables to obtain a targeted glycopeptide harboring a sialyl sugar chain in high yield without decomposing sialic acid at a non-reducing terminal of sugar chain when the glycopeptide is synthesized by a Boc solid phase synthesis method.[Solution to Problem]The present invention is characterized in that the Boc-sialylglycosylated amino acid derivative used in Boc solid phase synthesis method is one where the carboxyl group of the sialic acid at the sugar chain non-reducing terminal is protected with a phenacyl group.
摘要:
The present invention relates to the synthesis of peptide-oligonucleotide conjugates (POC). More specifically, the invention relates to a novel method for the preparation of peptide-oligonucleotide conjugates, which can be conducted under mild conditions on solid support, can be performed manually or by a synthesizer, can be used to synthesize alternating sequences of peptides and oligonucleotides, and is applicable to the synthesis of a wide variety of peptide-oligonucleotide conjugates constructed from alternate peptide and oligonucleotide blocks.
摘要:
A process for preparing a peptide with His or 3-Me-His at the C-terminus wherein the coupling with said His or (3-Me) His is carried out in the presence of triethylamine.