Acetylides
eMolecules 4-Bromo-2-ethynylpyridine | 1196155-22-2 | 1G | Purity: 98%
Combi-Blocks | 4-Bromo-2-ethynylpyridine | 1G | 1196155-22-2 | MFCD13189721
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eMolecules Oakwood Chemicals Copper(II) sulfate pentahydrate ACS reagent 2 5kg 480169046 492479 0 000 7758-99-8 MFCD00149681 249 680 CuH10O9S
Oakwood Chemicals Copper(II) sulfate pentahydrate ACS reagent 2 5kg 480169046 492479 0 000 7758-99-8 MFCD00149681 249 680 CuH10O9S
Medchemexpress LLC Propargyl-PEG10-acid | 2055022-18-7 | 98.0% | 524.60 | 100 MG
Propargyl-PEG10-acid is a PEG derivative featuring a propargyl group and a terminal carboxylic acid. It serves as a click chemistry reagent, utilizing an Alkyne group to engage in copper-catalyzed azide-alkyne cycloaddition (CuAAc) reactions with molecules containing Azide groups. For research use only.
- PEG derivative with propargyl and terminal carboxylic acid groups
- Functions as a click chemistry reagent
- Contains an Alkyne group
- Enables copper-catalyzed azide-alkyne cycloaddition (CuAAc) reactions
- Reacts with molecules possessing Azide groups
Medchemexpress LLC Bis-propargyl-PEG11 | 1351373-49-3 | 99.79% | 578.69 | 250 MG
Bis-propargyl-PEG11 is a PEG-based PROTAC linker utilized in the synthesis of PROTACs. It functions as a click chemistry reagent, containing an Alkyne group that can participate in copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules possessing Azide groups.
- PEG-based PROTAC linker.
- Can be used in the synthesis of PROTACs.
- Click chemistry reagent with an Alkyne group.
- Undergoes copper-catalyzed azide-alkyne cycloaddition (CuAAc) with Azide groups.
![Medchemexpress LLC Ethanamine, 2-[2-(2-propyn-1-yloxy)ethoxy]- | 944561-44-8 | 99.6% | 143.18 | C7H13NO2 | 1 G](https://assets.fishersci.com/TFS-Assets/CCG/product-images/5000203119.png-250.jpg)
Medchemexpress LLC Ethanamine, 2-[2-(2-propyn-1-yloxy)ethoxy]- | 944561-44-8 | 99.6% | 143.18 | C7H13NO2 | 1 G
Propargyl-PEG2-amine is a short PEG2-based linker containing a terminal propargyl (alkyne) group and a primary amine for bioconjugation. It is supplied as a colorless to light yellow liquid and is used as an ADC linker, PROTAC linker, and general crosslinking building block for click-type chemistries.
- Contains a terminal propargyl functional group for click reactions.
- Provides a short, flexible PEG2 spacer between functional groups.
- Features a primary amine for coupling to carboxyl or activated esters.
- Supplied as a colorless to light yellow liquid for easy handling.
- Molecular weight 143.18 and CAS number 944561-44-8 for unambiguous identification.
Medchemexpress LLC N-(Propargyl-PEG4)-biocytin | 2055042-71-0 | 98.0% | C28H46N4O9S | 100 MG
N-(Propargyl-PEG4)-biocytin is a PEG-based PROTAC linker utilized in the synthesis of PROTACs. It functions as a click chemistry reagent, featuring an alkyne group that enables copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing azide groups. This product is intended for research use only.
- Molecular weight: 614.75
- Purity: 98.0%
- Appearance: Solid
- Color: Light yellow to light brown
- PEG-based PROTAC linker
- Functions as a click chemistry reagent
- Enables copper-catalyzed azide-alkyne cycloaddition (CuAAc)
eMolecules Chem-Impex Copper(II) sulfate pentahydrate 2 5kg 603112431 35293 0 000 7758-99-8 MFCD00149681 249 680 CuH10O9S
Chem-Impex Copper(II) sulfate pentahydrate 2 5kg 603112431 35293 0 000 7758-99-8 MFCD00149681 249 680 CuH10O9S
Medchemexpress LLC Propargyl-PEG5-NHS ester | 1393330-40-9 | 98.0% | 401.41 g/mol | C18H27NO9 | 250 MG
Propargyl-PEG5-NHS ester is an alkyne-terminated, amine-reactive PEG5 NHS ester used for bioconjugation and click chemistry. The NHS ester reacts with primary amines to form stable amide bonds, while the propargyl (alkyne) group enables copper-catalyzed azide-alkyne cycloaddition (CuAAC), making it suitable for linker incorporation in antibody-drug conjugates and PROTAC synthesis.
- Amine-reactive NHS ester for stable amide formation.
- Alkyne (propargyl) handle for copper-catalyzed click chemistry.
- PEG5 spacer provides hydrophilicity and conformational flexibility.
- High purity suitable for research-grade bioconjugation.
- Available in milligram to gram pack sizes for method development.
Medchemexpress LLC E -Pent-2-enal 5g
(E)-Pent-2-enal has a pungent fruity odor This compound is commonly used in the flavor and fragrance industry because of its strong aroma often described as fresh and green Furthermore (E)-Pent-2-enal can be used as an intermediate in the synthesis of various organic compounds including pharmaceuticals and agrochemicals Its unique chemical properties make it an important ingredient in many commercial products including perfumes air fresheners and cleaners
Medchemexpress LLC Propargyl-PEG6-NHS ester | 2093153-99-0 | 98.0% | 445.46 g/mol | C20H31NO10 | 250 MG
Propargyl-PEG6-NHS ester is an alkyne-functionalized polyethylene glycol (PEG6) N-hydroxysuccinimide (NHS) ester used for bioconjugation and linker synthesis. It reacts with primary amines to form stable amide bonds and provides an alkyne handle suitable for copper-catalyzed azide-alkyne cycloaddition (CuAAC) click chemistry.
- Amine-reactive NHS ester for stable amide bond formation.
- Alkyne handle for copper-catalyzed azide-alkyne cycloaddition (CuAAC).
- Peg6 spacer to improve solubility and reduce steric hindrance.
- High purity suitable for synthetic bioconjugation workflows.
- Available in small pack sizes for laboratory-scale synthesis.
eMolecules 2-Formyl-5-(trifluoromethoxy)phenylboronic acid | 1218790-89-6 | MFCD10566600 | 1g
Combi-Blocks | 2-Formyl-5-(trifluoromethoxy)phenylboronic acid | 1g | 117526368 | BB-9057 | 97.000 | 1218790-89-6 | MFCD10566600 | 233.940 | C8H6BF3O4
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Medchemexpress LLC Propargyl-PEG1-bromide | 18668-74-1 | MFCD00099299 | 98.0% | 163.01 g/mol | C5H7BrO | 250 MG
Propargyl-PEG1-bromide is a PEG-derived reagent bearing a propargyl (alkynyl) group and a terminal bromide. It serves as a reactive building block for introducing a short PEG1 spacer with an alkyne handle in synthesis workflows for chemical biology, bioconjugation, and drug delivery linker development.
- Small PEG spacer with propargyl functional group.
- Terminal bromide for alkylation or nucleophilic substitution reactions.
- Compatible with click chemistry and linker installation workflows.
- Useful for drug delivery and bioconjugation research applications.
- Molecular weight 163.01 g/mol.
- Chemical formula C5H7BrO.
- CAS number 18668-74-1.
- Typical purity 98.0%.
Medchemexpress LLC 3-Butynyl p-toluenesulfonate | 23418-85-1 | MFCD00041687 | 98.7% | 224.28 g/mol | C11H12O3S | 10 G
An alkyne-bearing p-toluenesulfonate ester used as a click-chemistry reagent and cleavable linker for antibody-drug conjugate synthesis; it undergoes copper-catalyzed azide-alkyne cycloaddition (CuAAC).
- Reacts in copper-catalyzed azide-alkyne cycloaddition (CuAAC).
- Molecular formula C11H12O3S; molecular weight 224.28 g/mol.
- CAS number 23418-85-1.
- Purity typically 98.7%.
- Appearance colorless to light yellow liquid.
- Available in 1 g, 5 g, 10 g, and 50 g package sizes.
Medchemexpress LLC Propargyl-PEG12-OH 100mg | 1036204-61-1 | 584.69 | C27H52O13 | 100 MG
Propargyl-PEG12-OH is a PEG12-based propargyl (alkyne) linker used as a click-chemistry reagent for PROTAC synthesis and bioconjugation. It contains a terminal alkyne that undergoes copper-catalyzed azide-alkyne cycloaddition (CuAAC) to conjugate with azide-containing molecules. Supplied for research use in multiple pack sizes.
- Contains terminal alkyne for CuAAC (click chemistry).
- PEG12 spacer provides water solubility and conformational flexibility.
- High purity suitable for organic synthesis and conjugation reactions.
- Available in mg to g pack sizes for lab-scale synthesis.