Organometallic Compounds
![Medchemexpress LLC Hydroxylamine, O-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethyl]- | 1306615-51-9 | MFCD28505530 | 95.0% | 234.25 g/mol | C8H18N4O4 | 10 MG](https://assets.fishersci.com/TFS-Assets/CCG/product-images/5000202088.png-250.jpg)
Medchemexpress LLC Hydroxylamine, O-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethyl]- | 1306615-51-9 | MFCD28505530 | 95.0% | 234.25 g/mol | C8H18N4O4 | 10 MG
Aminooxy-PEG3-azide is a PEG-based bifunctional linker containing an aminooxy (oxyamine) group and an azide group. It is used as a non-cleavable three-unit PEG spacer for antibody-drug conjugate (ADC) and PROTAC synthesis, and as an azide reagent for click chemistry reactions such as CuAAC and SPAAC.
- Bifunctional aminooxy and azide groups for oxime ligation and click chemistry.
- Non-cleavable three-unit PEG spacer suitable for ADC and PROTAC linker installation.
- Purity 95.0% and molecular weight 234.25 g/mol.
- Appearance colorless to light yellow liquid for easy handling.
- Storage: pure form -20°C (stable 3 years); in solvent -80°C (6 months) or -20°C (1 month).
- Available in small pack sizes, including 10 mg for small-scale synthesis.
Medchemexpress LLC S -2- 2- tert-Buto 100g
(S)-2-(2-((tert-Butoxycarbonyl)amino)-3-(1-trityl-1H-imidazol-4-yl)propanamido)-2-methylpropanoic acid (Boc-his(trt)-aib-ohol) is a drug intermediate for synthesis of various active compounds
Medchemexpress LLC Bis-PEG3-NHS ester | 1314378-16-9 | MFCD20227484 | 97.0% | 444.39 g·mol⁻¹ | C18H24N2O11 | 100 MG
Bis-PEG3-NHS ester is a noncleavable, three-unit polyethylene glycol (PEG) linker bearing two N-hydroxysuccinimide (NHS) ester termini for amine coupling. It is intended for antibody-agent conjugation and related bioconjugation chemistries, enabling formation of stable amide bonds to primary amines on proteins or small molecules.
- Noncleavable three-unit PEG spacer suitable for antibody-agent conjugation and bioconjugation.
- Two NHS ester reactive termini for efficient amine coupling to primary amines.
- White to off-white solid, convenient for bench handling.
- High purity (97.0%) with CAS 1314378-16-9 and formula C18H24N2O11.
- Storage: powder at -20°C (stable up to 3 years); in solvent at -80°C (6 months) or -20°C (1 month).
Medchemexpress LLC Biotin-PEG3-SS-azide | 2866429-93-6 | 99.6% | 692.91 | C27H48N8O7S3 | 10 MG
Biotin-PEG3-SS-azide is a cleavable three-unit polyethylene glycol linker bearing a biotin group and a terminal azide, designed for conjugation chemistry in research applications. It is suitable for click chemistry reactions and as a cleavable linker in the synthesis of antibody-drug conjugates.
- Cleavable disulfide linker provides intracellular release.
- Azide functionality enables CuAAC and strain-promoted cycloaddition.
- PEG3 spacer increases solubility and reduces steric hindrance.
- High purity supports reliable conjugation results.
- Soluble in DMSO at high concentration for in vitro use.
- Recommended storage at low temperature and protection from light to preserve stability.
Medchemexpress LLC M-PEG5-acid | 81836-43-3 | MFCD20926398 | 95.0% | 280.31 g/mol | C12H24O7 | 1 G
m-PEG5-acid is a monomethylated polyethylene glycol (PEG) linker terminated with a carboxylic acid group, used as a short spacer in the synthesis of PROTACs and other bioconjugates. It provides a PEG5 (approximately five ethylene oxide units) spacer with a reactive carboxylic acid for standard coupling chemistries.
- Short monomethylated PEG5 spacer with terminal carboxylic acid.
- Useful as a linker in PROTAC and conjugate synthesis.
- Molecular weight ~280.31 g/mol and formula C12H24O7.
- Typical purity around 95.0%.
- Light yellow to light brown liquid; density ~1.107 g/cm3.
- Store sealed, away from moisture; use cold storage for solutions.
![Medchemexpress LLC Propanoic acid, 3-[2-[2-(2-hydroxyethoxy)ethoxy]ethoxy]-, 1,1-dimethylethyl ester | 186020-66-6 | 95.0% | 278.34 g/mol | C13H26O6 | 25 G](https://assets.fishersci.com/TFS-Assets/CCG/product-images/5000202875.png-250.jpg)
Medchemexpress LLC Propanoic acid, 3-[2-[2-(2-hydroxyethoxy)ethoxy]ethoxy]-, 1,1-dimethylethyl ester | 186020-66-6 | 95.0% | 278.34 g/mol | C13H26O6 | 25 G
Hydroxy-PEG3-(CH2)2-Boc is a Boc-protected, hydroxy-terminated polyethylene glycol linker used as a building block in linker and PROTAC synthesis. Supplied as a white to off-white solid, it has a typical purity of 95.0% and a molecular weight of 278.34 g/mol (CAS 186020-66-6).
- Boc-protected hydroxy-terminated PEG3 linker for synthetic chemistry.
- Typical purity 95.0% by NMR.
- Molecular weight 278.34 g/mol.
- Chemical formula C13H26O6.
- Supplied as a 25 g package for laboratory research use only.
Medchemexpress LLC T-Boc-aminooxy-PEG5-azide | 2250216-95-4 | 95.0% | C17H34N4O8 | 100 MG
T-Boc-Aminooxy-PEG5-azide is a PEG-based PROTAC linker designed for use in the synthesis of PROTACs. It functions as a versatile click chemistry reagent, enabling efficient conjugation with various molecules.
- Functions as a click chemistry reagent
- Contains an azide group for copper-catalyzed azide-alkyne cycloaddition (CuAAc) reactions
- Compatible with molecules containing alkyne groups
- Participates in strain-promoted alkyne-azide cycloaddition (SPAAC) reactions
- Reacts with molecules containing DBCO or BCN groups
Medchemexpress LLC 1,2:3,5-di-O-isopropylidene-α-D-xylofuranose | 20881-04-3 | MFCD00063224 | 98.9% | 230.26 g/mol | C11H18O5 | 5 G
1,2:3,5-Di-O-isopropylidene-α-D-xylofuranose is an isopropylidene-protected derivative of α-D-xylofuranose supplied as a white to off-white solid. It is used as a protected sugar intermediate and building block in organic synthesis and carbohydrate chemistry, suitable for laboratory research and small-scale synthesis.
- Protected sugar intermediate for synthetic chemistry.
- High purity (approx. 98.9%) suitable for research applications.
- White to off-white solid for convenient handling and storage.
- Compatible with common carbohydrate modification and derivatization reactions.
- Available in typical laboratory pack sizes for small-scale use.
Medchemexpress LLC N-(Amino-PEG3)-N-bis(PEG4-Boc) | 2353409-57-9 | MFCD29267156 | >98% | C38H77NO17 | 50 MG
N-(Amino-PEG3)-N-bis(PEG4-Boc) is a building block and PEG linker used to synthesize various PEG-based linkers. It can easily react with activated NHS esters or carboxylic acid in the presence of EDC or HATU. The t-butyl group can be deprotected under acidic conditions, and it is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs.
- Easily reacts with activated NHS esters or carboxylic acid in the presence of EDC or HATU.
- t-butyl group can be deprotected under acidic conditions.
- Functions as a PEG-based PROTAC linker.
Medchemexpress LLC RS-79948 hydrochloride hemihydrate | 186002-54-0 | 99.5% | 400.96 | C19H29ClN2O3S | 5 MG
RS-79948-197 hemihydrate is the hemihydrate salt of RS-79948, a selective non-imidazoline α2-adrenoceptor antagonist used in adrenergic receptor pharmacology research. Supplied as a white to off-white, high-purity solid in milligram quantities, it is intended for ligand binding, receptor characterization, and related in vitro or in vivo studies.
- High purity (99.5%) suitable for sensitive assays.
- Hemihydrate solid form for stable handling and storage.
- Selective α2-adrenoceptor antagonist activity reported across species.
- Small mg packaging appropriate for tracer and ligand studies.
- Certificate of analysis and safety data available for each batch.
Medchemexpress LLC N-(Azido-PEG3)-N-(PEG2-amine)-PEG3-acid | 2183440-70-0 | 99.6% | C24H47N5O11 | 25 MG
N-(Azido-PEG3)-N-(PEG2-amine)-PEG3-acid is a PEG-based PROTAC linker primarily used in the synthesis of PROTACs. It acts as a versatile click chemistry reagent, facilitating selective degradation of target proteins via the intracellular ubiquitin-proteasome system.
- Contains an Azide group
- Participates in copper-catalyzed azide-alkyne cycloaddition reactions (CuAAc) with molecules possessing Alkyne groups
- Undergoes strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups
- Functions as a PROTAC linker
- Utilized in PROTAC synthesis
![Medchemexpress LLC 2-Chloro-7-cyclopentyl-7H-pyrrolo[2,3-d]pyrimidine-6-methanol | 1374639-77-6 | 99.0% | 251.72 | 25 G](https://assets.fishersci.com/TFS-Assets/CCG/product-images/5000403122-logo.png-250.jpg){kind=logo}
Medchemexpress LLC 2-Chloro-7-cyclopentyl-7H-pyrrolo[2,3-d]pyrimidine-6-methanol | 1374639-77-6 | 99.0% | 251.72 | 25 G
2-Chloro-7-cyclopentyl-7H-pyrrolo[2,3-d]pyrimidine-6-methanol is a drug intermediate for the synthesis of various active compounds. It is for research use only and not sold to patients.
- For research use only
- Drug intermediate for various active compounds
Medchemexpress LLC Levofloxacin hydrate | 138199-71-0 | 100.0% | 1 ML
Levofloxacin hydrate, also known as Levofloxacin hemihydrate, is an orally active antibiotic effective against both Gram-positive and Gram-negative bacteria. It functions by inhibiting DNA gyrase and topoisomerase IV. This compound is utilized in research for chronic periodontitis, airway inflammation, and BK Viremia, and has demonstrated anti-orthopoxvirus activity.
- Orally active antibiotic.
- Active against both Gram-positive and Gram-negative bacteria.
- Inhibits DNA gyrase and topoisomerase IV.
- Applicable for research in chronic periodontitis, airway inflammation, and BK Viremia.
- Shows anti-orthopoxvirus activity.
Medchemexpress LLC Sitafloxacin (hydrate) (standard) | 163253-35-8 | 99.89% | 5 MG
Sitafloxacin hydrate is an orally active fluoroquinolone antibiotic with in vitro activity against a wide range of Gram-positive and -negative bacteria, anaerobic bacteria, and atypical pathogens. It is primarily used for research and analytical applications, particularly in studies of respiratory and urinary tract infections. This product is intended for research use only and is not validated for medical applications.
- Orally active fluoroquinolone antibiotic
- Demonstrates in vitro activity against Gram-positive and -negative bacteria
- Effective against anaerobic bacteria and atypical pathogens
- Used in the study of respiratory tract infections
- Used in the study of urinary tract infections
- Functions as an analytical standard for research
- Intended for research use only