摘要:
A new method of anchoring a growing peptide chain during chemical synthesis to a solid-phase support is devised. Novel amino acid derivatives and peptide derivatives, both unbonded and bonded to a solid-phase support, are also provided.
摘要:
Exenatide, a polypeptide having the 39 amino acid sequence H-1His-Gly-Glu-Gly-5Thr-Phe-Thr-Ser-Asp-10Leu-Ser- Lys-Gln-Met-15Glu-Glu-Glu--Ala-Val-20Arg-Leu-Phe- Ile-Glu-25Trp-Leu-Lys-Asn-Gly-30Gly-Pro-Ser-Ser- Gly-35Ala--Pro-Pro-Pro-Ser-NH2, respectively its 44-mer analogue H-1His-Gly-Glu-Gly-5Thr-Phe-Thr-Ser-Asp-10Leu-Ser- Lys-Gln-Met-15Glu-Glu-Glu--Ala-Val-20Arg-Leu-Phe- Ile-Glu-25Trp-Leu-Lys-Asn-Gly-30Gly-Pro-Ser-Ser- Gly-35Ala--Pro-Pro-Ser-Lys-40Lys-Lys-Lys-Lys-Lys- NH2 is prepared via a convergent four-fragment synthesis strategy from the fragments comprising the amino acid positions 1-10, 11-21, 22-29 and 30-39, respectively 30-44.
摘要:
A novel for amidation of C-terminal carboxyl groups of peptides is devised, which methods avoids undesired epimerisation of the α-carbon of the C-terminal amino acid yielding diastereoisomeric variants of the amidated peptide.
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 fragment; 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:
The invention relates to indolesulfonyl halogenides which are useful for the protection of organic compounds comprising at least one guanidino moiety and/or at least one amino group. The invention further relates to a process for their preparation and their use as protecting reagents. The invention also relates to the process for the protecting reaction and to the protected compounds thereof.
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 fragment; 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:
The invention relates to indolesulfonyl halogenides which are useful for the protection of organic compounds comprising at least one guanidino moiety and/or at least one amino group. The invention further relates to a process for their preparation and their use as protecting reagents. The invention also relates to the process for the protecting reaction and to the protected compounds thereof.