Mal-PEG4-Glu(OH)-NH-m-PEG24 - CAS 2204309-09-9

Mal-PEG4-Glu(OH)-NH-m-PEG24 is a polyethylene glycol (PEG)-based PROTAC linker. Mal-PEG4-Glu(OH)-NH-m-PEG24 can be used in the synthesis of a series of PROTACs.

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Molecular Formula
C₇₂H₁₃₄N₄O₃₅
Molecular Weight
1615.84

Mal-PEG4-Glu(OH)-NH-m-PEG24

    • Specification
      • Storage
        Please store the product under the recommended conditions in the Certificate of Analysis.
        Shipping
        Room temperature in continental US; may vary elsewhere.
        IUPAC Name
        (4S)-4-[3-[2-[2-[2-[2-[3-(2,5-dioxopyrrol-1-yl)propanoylamino]ethoxy]ethoxy]ethoxy]ethoxy]propanoylamino]-5-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-(2-methoxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethylamino]-5-oxopentanoic acid
    • Properties
      • InChI Key
        SLNDHPJTHXRBOW-FGKSCKJQSA-N
        InChI
        InChI=1S/C72H134N4O35/c1-84-14-15-88-22-23-92-28-29-94-32-33-96-36-37-98-40-41-100-44-45-102-48-49-104-52-53-106-56-57-108-60-61-110-64-65-111-63-62-109-59-58-107-55-54-105-51-50-103-47-46-101-43-42-99-39-38-97-35-34-95-31-30-93-27-26-91-21-18-87-13-9-74-72(83)66(2-5-71(81)82)75-68(78)7-11-85-16-19-89-24-25-90-20-17-86-12-8-73-67(77)6-10-76-69(79)3-4-70(76)80/h3-4,66H,2,5-65H2,1H3,(H,73,77)(H,74,83)(H,75,78)(H,81,82)/t66-/m0/s1
        Canonical SMILES
        COCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCNC(=O)C(CCC(=O)O)NC(=O)CCOCCOCCOCCOCCNC(=O)CCN1C(=O)C=CC1=O
    • Reference Reading
      • 1. A-ring analogs of 1,25-dihydroxyvitamin D(3)
        Agnieszka Glebocka, Grazia Chiellini Arch Biochem Biophys. 2012 Jul 1;523(1):48-57.doi: 10.1016/j.abb.2011.11.010.Epub 2011 Nov 15.
        The growing interest in1α,25(OH)(2)D(3), the hormonally active form of vitamin D(3), has prompted numerous efforts to synthesize vitamin D analogs as potential therapeutic agents, and some of these are already on the market and in clinical development. Although most vitamin D preparations developed thus far have focused on side-chain modifications, providing many useful analogues with high potency and selectivity, in recent years, modifications of the A-ring has attracted much attention because it can afford useful analogues exhibiting unique activity profiles as well. In this review we will focus on the current understanding of the relationship between selected modifications in the A-ring of the 1α,25(OH)(2)D(3) molecule, such as epimerization and/or substitution at C-1 and C-3, substitution at C-2, and removal of the 10,19-exocyclic methylene group, and their effect on biological potency and selectivity. Finally, suggestions for the structure-based design of therapeutically valuable A-ring vitamin D analogs will conclude the review.
        2. Bioactive heterocycles containing endocyclic N-hydroxy groups
        Reshma Rani, Carlotta Granchi Eur J Med Chem. 2015 Jun 5;97:505-24.doi: 10.1016/j.ejmech.2014.11.031.Epub 2014 Nov 18.
        Drug-likeness rules consider N-O single bonds as "structural alerts" which should not be present in a perspective drug candidate. In most cases this concern is correct, since it is known that N-hydroxy metabolites of branded drugs produce reactive species that cause serious side effects. However, this dangerous reactivity of the N-OH species generally takes place when the nitrogen atom is not comprised in a cyclic moiety. In fact, the same type of metabolic behavior should not be expected when the nitrogen atom is included in the ring of an aromatic heterocyclic scaffold. Nevertheless, heterocycles bearing endocyclic N-hydroxy portions have so far been poorly studied as chemical classes that may provide new therapeutic agents. This review provides an overview of N-OH-containing heterocycles with reported bioactivities that may be considered as therapeutically relevant and, therefore, may extend the chemical space available for the future development of novel pharmaceuticals. A systematic treatment of the various chemical classes belonging to this particular family of molecules is described along with a discussion of the biological activities associated to the most important examples.
        3. Organoplatinum Compounds as Anion-Tuneable Uphill Hydroxide Transporters
        Li-Jun Chen, Xin Wu, Alexander M Gilchrist, Philip A Gale Angew Chem Int Ed Engl. 2022 May 2;61(19):e202116355.doi: 10.1002/anie.202116355.Epub 2022 Mar 11.
        Active transport of ions uphill, creating a concentration gradient across a cell membrane, is essential for life. It remains a significant challenge to develop synthetic systems that allow active uphill transport. Here, a transport process fuelled by organometallic compounds is reported that creates a pH gradient. The hydrolysis reaction of PtII complexes results in the formation of aqua complexes that established rapid transmembrane movement ("flip-flop") of neutral Pt-OH species, leading to protonation of the OH group in the inner leaflet, generating OH- ions, and so increasing the pH in the intravesicular solution. The organoplatinum complex effectively transports bound hydroxide ions across the membrane in a neutral complex. The initial net flow of the PtII complex into the vesicles generates a positive electric potential that can further drive uphill transport because the electric potential is opposed to the chemical potential of OH- . The OH- ions equilibrate with this transmembrane electric potential but cannot remove it due to the relatively low permeability of the charged species. As a result, effective hydroxide transport against its concentration gradient can be achieved, and multiple additions can continuously drive the generation of OH- against its concentration gradient up to ΔpH>2. Moreover, the external addition of different anions can control the generation of OH- depending on their anion binding affinity. When anions displayed very high binding affinities towards PtII compounds, such as halides, the external anions could dissipate the pH gradient. In contrast, a further pH increase was observed for weak binding anions, such as sulfate, due to the increase of positive electric potential.
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