Catalytic enantioselective addition of hydrogen cyanide to benzaldehyde and p-methoxybenzaldehyde using cyclo-His-(α-Me)Phe as catalyst
摘要:
Two cyclo-dipeptides based on His and the unnatural (alpha Me)Phe have been examined as catalysts in the enantioselective addition of hydrogen cyanide to benzaldehyde and p-methoxy-benzaldehyde. The synthesis, catalytic activity and NMR study towards the mechanism of this reaction are presented. (C) 1997 Elsevier Science Ltd.
Solid-phase peptide synthesis in water. Part 3: A water-soluble N-protecting group, 2-[phenyl(methyl)sulfonio]ethoxycarbonyl tetrafluoroborate, and its application to solid phase peptide synthesis in water
作者:Keiko Hojo、Mitsuko Maeda、Koichi Kawasaki
DOI:10.1016/j.tet.2003.12.036
日期:2004.2
Chemical synthesis of peptides has been performed in various organic solvents, but the safe disposal of organic solvents is now an important environmental issue. Our aim is to be able to perform solid-phase peptidesynthesis in water. For this, we have designed a new water-soluble N-protecting group, 2-[phenyl(methyl)sulfonio]ethoxycarbonyl (Pms), and have studied its introduction onto amino acids
A catalytic one-step synthesis of peptide thioacids was developed. The oxygen–sulfur atom exchange reaction converted the carboxy group at the C-terminus of the peptides into a thiocarboxy group with suppressed epimerization. This method was successfully applied to the synthesis of the peptide drug leuprorelin via an iterative fragment-coupling protocol.
Solid phase strategies: Applications of 2-acetyl-4-nitroindane-1,3-dione as a selective protecting group for primary amines
作者:Barrie Kellam、Barrie W. Bycroft、Weng C. Chan、Siri Ram Chhabra
DOI:10.1016/s0040-4020(98)00365-2
日期:1998.6
successfully exploited as a primaryamineprotectinggroup displaying excellent acid and secondary/tertiary base stability, but which can be removed with 2% hydrazine at ambient temperature. (1) has been condensed with both amino acids and spermidine, affording derivatives which were subsequently utilised in the solidphase synthesis of various peptides and the glutathione-spermidine conjugate trypanothione respectively
Automated Maskless Photolithography System for Peptide Microarray Synthesis on a Chip
作者:Dong-Sik Shin、Kook-Nyung Lee、Byung-Wook Yoo、Jaehi Kim、Mira Kim、Yong-Kweon Kim、Yoon-Sik Lee
DOI:10.1021/cc100009g
日期:2010.7.12
Maskless photolithographic peptide synthesis was performed on a glass chip using an automated peptide array synthesizer system. The peptide array synthesizer was built in a closed box, which contained optical and fluidic systems. The conditions for peptide synthesis were fully controlled by a computer program. For the peptide synthesis on a glass chip, 20 NVOC-protected amino acids were synthesized. The coupling efficiencies of two model peptide sequences were examined on ACA/APTS and PEG/CHI/GPTS chips. PEG/CHI/GPIS chip gave higher average stepwise yields of GIYWHHY (94%) and YIYGSFK (98%) than those of ACA/APTS chip. To quantify peptide-protein binding affinity, HPQ- or HPM-containing pentapeptides were synthesized on a PEG/CHI/GPTS chip and the binding event of Cy3 labeled-streptavidin was quantified. The peptide sequence of IQHPQ showed highest binding affinity with Cy3 labeled-streptavidin. The results demonstrated that the photolithographic peptide array synthesis method efficiently quantified the binding activities of protein-peptide interactions and it can be used for additional biological assay applications.