Divergent Stereoselectivity in Phosphothreonine (pThr)-Catalyzed Reductive Aminations of 3-Amidocyclohexanones
摘要:
Phosphothreonine (pThr)-embedded peptide catalysts are found to mediate the reductive amination of 3-amidocyclohexanones with divergent selectivity. The choice of peptide sequence can be used to alter the diastereoselectivity to favor either the cis-product or trans-product, which are obtained in up to 93:7 er. NMR studies and DFT calculations are reported and indicate that both pathways rely on secondary interactions between substrate and catalyst to achieve selectivity. Furthermore, catalysts appear to accomplish a parallel kinetic resolution of the substrates. The facility for phosphopeptides to tune reactivity and access multiple products in reductive aminations may translate to the diversification of complex substrates, such as natural products, at numerous reactive sites.
A General Preparation of Protected Phosphoamino Acids
摘要:
Fmoc-O-benzyk-phosphoserine is an important building block in the synthesis of Forigerimod, a phosphopeptide being investigated for Systemic Lupus Erythematosus (SLE). An efficient one-pot process was developed using inexpensive, readily available starting materials. This general procedure was used to prepare a variety of protected phosphoamino acids.
申请人:YISSUM RESEARCH DEVELOPMENT COMPANY OF THE HEBREW UNIVERSITY OF JERUSALEM LTD.
公开号:US20200010502A1
公开(公告)日:2020-01-09
The present invention relates to a new approach for the synthesis of multiphosphorylated peptides. Specifically, the present invention provides a process, which enables the synthesis of multiphosphorylated peptides with up to seven phosphorylated Serine (pSer) and Threonine (pThr) residues, including such residues that are close in sequence.
Design and Synthesis of Fmoc-Thr[PO(OH)(OPOM)] for the Preparation of Peptide Prodrugs Containing Phosphothreonine in Fully Protected Form
作者:Wen-Jian Qian、Christopher C. Lai、James A. Kelley、Terrence R. Burke
DOI:10.1002/cbdv.201300202
日期:2014.5
and efficient synthesis of N‐Fmoc‐phosphothreonine protected by a mono‐(pivaloyloxy)methyl (POM) moiety at its phosphoryl group (Fmoc‐Thr[PO(OH)(OPOM)]‐OH, 1, is reported. This reagent is suitable for solid‐phase syntheses employing acid‐labile resins and Fmoc‐based protocols. It allows the preparation of phosphothreonine (pThr)‐containing peptides bearing bis‐POM‐phosphoryl protection. The methodology
Divergent Control of Point and Axial Stereogenicity: Catalytic Enantioselective C−N Bond‐Forming Cross‐Coupling and Catalyst‐Controlled Atroposelective Cyclodehydration
作者:Yongseok Kwon、Alex J. Chinn、Byoungmoo Kim、Scott J. Miller
DOI:10.1002/anie.201802963
日期:2018.5.22
chirality. Newly developed peptidyl copper complexes catalyze an unprecedented remote desymmetrization involving enantioselective C−N bond‐formingcross‐coupling. Then, chiral phosphoric acid catalysts set an axis of chirality through an unprecedented atroposelective cyclodehydration to form a heterocycle with high diastereoselectivity. The application of chiral copper complexes and phosphoric acids provides
Phosphothreonine as a Catalytic Residue in Peptide-Mediated Asymmetric Transfer Hydrogenations of 8-Aminoquinolines
作者:Christopher R. Shugrue、Scott J. Miller
DOI:10.1002/anie.201505898
日期:2015.9.14
Phosphothreonine (pThr) was found to constitute a new class of chiral phosphoric acid (CPA) catalyst upon insertion into peptides. To demonstrate the potential of these phosphopeptides as asymmetric catalysts, enantioselective transferhydrogenations of a previously underexplored substrate class for CPA‐catalyzed reductions were carried out. pThr‐containing peptides lead to the observation of enantioselectivities
PEPTIDE AND PEPTIDE MIMETIC BINDING ANTAGONISTS OF POLO-LIKE KINASE 1 POLO BOX DOMAIN AND METHODS OF USE
申请人:THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY, DEPARTMENT OF HEALTH & HUMAN SERVIC
公开号:US20160039872A1
公开(公告)日:2016-02-11
The invention provides novel compounds that may serve as anticancer therapeutics. The compounds of the invention bind to polo-like kinases through the polo-box domain. In certain embodiments, the compounds of the invention are POM-protected peptide derivatives. The use of cationic bis-alkyl his residues in combination with a mono POM-protected pho-phoryl group results in a peptide possessing an overall neutral charge. The peptide derivatives of the invention have achieved both good efficacy and an enhanced bioavailability. The invention also provides methods of use, compositions, and kits thereof. Further, the invention provides a novel method of design and/or synthesis of phosphoryl-derived peptide derivatives useful as therapeutic agents.