Resolution of N-protected amino acid esters using whole cells of Candida parapsilosis ATCC 7330
摘要:
Whole cells of Candida parapsilosis ATCC 7330 were used for the resolution of N-acetyl amino acid esters. Excellent enantioselectivities (E = 40 to >500) were achieved for the resolution of N-protected protein and non-protein amino acid esters giving good yields (28-50%) and high enantiomeric excesses (up to >99%) for both enantiomers. (C) 2010 Elsevier Ltd. All rights reserved.
Resolution of N-protected amino acid esters using whole cells of Candida parapsilosis ATCC 7330
摘要:
Whole cells of Candida parapsilosis ATCC 7330 were used for the resolution of N-acetyl amino acid esters. Excellent enantioselectivities (E = 40 to >500) were achieved for the resolution of N-protected protein and non-protein amino acid esters giving good yields (28-50%) and high enantiomeric excesses (up to >99%) for both enantiomers. (C) 2010 Elsevier Ltd. All rights reserved.
[EN] pH-SENSITIVE PEPTIDES<br/>[FR] PEPTIDES SENSIBLES AU PH
申请人:RHODE ISLAND COUNCIL ON POSTSECONDARY EDUCATION
公开号:WO2017165452A1
公开(公告)日:2017-09-28
The present subject matter provides pH triggered peptides, as well as compositions methods, devices, and systems comprising the same. The pH triggered peptides include cyclic and short linear peptides, and may have higher affinity to a membrane lipid bilayer at low pH than at neutral or high pH.
The present subject matter provides pH triggered peptides, as well as compositions methods, devices, and systems comprising the same. The pH triggered peptides include cyclic and short linear peptides, and may have higher affinity to a membrane lipid bilayer at low pH than at neutral or high pH.
Asymmetric Synthesis of Unnatural Amino Acids and Tamsulosin Chiral Intermediate
作者:Veera Reddy Arava、Srinivasulu Reddy Amasa、Bharat Kumar Goud Bhatthula、Laxmi Srinivas Kompella、Venkata Prasad Matta、M. C. S. Subha
DOI:10.1080/00397911.2012.748075
日期:2013.11.2
An efficient and enantioselective hydrogenation of N-acetylamino phenyl acrylic acids was successfully developed by using ruthenium catalyst. This methodology is important in the field of pharmaceuticals and provides a new process for the preparation of unnatural amino acids and tamsulosin chiral intermediate. [Supplementary materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) for the following free supplemental resource: Full experimental and spectral details.]
Novel atropisomeric bisphosphine ligands with a bridge across the 5,5′-position of the biphenyl for asymmetric catalysis
A new type of atropisomeric bisphosphine ligand 2 with a bridge across the 5,5'-position of the biphenyl has been developed. The axial chirality of this type of ligands can be retained by macrocyclic ring strain produced from 5,5'-linkage of the biphenyl even without 6,6'-substituents on the biphenyls. Ligand (R)-2a showed good catalytic activity and enantioselectivity for Rh(I)-catalyzed asymmetric hydrogenation of (Z)-alpha-acetamidocinnamic acid 11. (C) 2008 Elsevier Ltd. All rights reserved.
Synthesis of a novel spiro bisphosphinite ligand and its application in Rh-catalyzed asymmetric hydrogenation
作者:Zhenqiu Guo、Xiaoyu Guan、Zhiyong Chen
DOI:10.1016/j.tetasy.2006.01.021
日期:2006.2
A novel, chiral bisphosphinite ligand (R)-SpiroBIP has been synthesized. The rhodium complex of the ligand was found to be highly enantioselective in the asymmetric hydrogenation of alpha-dehydroamino acid derivatives. (c) 2006 Published by Elsevier ltd.