Heteroaromatic compounds

Imidazole (Certified), Fisher Chemical

CAS: 288-32-4 Molecular Formula: C3H4N2 Molecular Weight (g/mol): 68.08 MDL Number: MFCD00005183 InChI Key: RAXXELZNTBOGNW-UHFFFAOYSA-N Synonym: imidazole,glyoxaline,imidazol,iminazole,miazole,1,3-diazole,glyoxalin,imutex,1,3-diaza-2,4-cyclopentadiene,pyrro b monazole PubChem CID: 795 ChEBI: CHEBI:16069 IUPAC Name: 1H-imidazole SMILES: N1C=CN=C1

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Imidazole (Molecular Biology), Fisher BioReagents™,50g

CAS: 288-32-4 Molecular Formula: C3H4N2 Molecular Weight (g/mol): 68.08 MDL Number: MFCD00005183 InChI Key: RAXXELZNTBOGNW-UHFFFAOYSA-N Synonym: imidazole,glyoxaline,imidazol,iminazole,miazole,1,3-diazole,glyoxalin,imutex,1,3-diaza-2,4-cyclopentadiene,pyrro b monazole PubChem CID: 795 ChEBI: CHEBI:16069 IUPAC Name: 1H-imidazole SMILES: N1C=CN=C1

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Ethyl 5-Amino-4-cyano-3-(2-ethoxycarbonylmethyl)thiophene-2-carboxylate 98.0+%, TCI America™

CAS: 58168-20-0 Molecular Formula: C12H14N2O4S Molecular Weight (g/mol): 282.314 MDL Number: MFCD00832845 InChI Key: FLAGIUJSXKJCOB-UHFFFAOYSA-N Synonym: 5-Amino-4-cyano-3-(2-ethoxycarbonylmethyl)thiophene-2-carboxylic Acid Ethyl Ester PubChem CID: 2741370 IUPAC Name: ethyl 5-amino-4-cyano-3-(2-ethoxy-2-oxoethyl)thiophene-2-carboxylate SMILES: CCOC(=O)CC1=C(SC(=C1C#N)N)C(=O)OCC

Imidazole, 99%

CAS: 288-32-4 Molecular Formula: C3H4N2 Molecular Weight (g/mol): 68.08 MDL Number: MFCD00005183 InChI Key: RAXXELZNTBOGNW-UHFFFAOYSA-N Synonym: imidazole,glyoxaline,imidazol,iminazole,miazole,1,3-diazole,glyoxalin,imutex,1,3-diaza-2,4-cyclopentadiene,pyrro b monazole PubChem CID: 795 ChEBI: CHEBI:16069 IUPAC Name: 1H-imidazole SMILES: N1C=CN=C1

Purine, 99%

CAS: 120-73-0 MDL Number: MFCD00079221 InChI Key: KDCGOANMDULRCW-UHFFFAOYSA-N Synonym: purine,9h-purine,1h-purine,isopurine,beta-purine,7h-imidazo 4,5-d pyrimidine,imidazo 4,5-d pyrimidine,3,5,7-triazaindole,9h-purine van,3h-purine PubChem CID: 1044 ChEBI: CHEBI:17258 IUPAC Name: 7H-purine SMILES: C1=C2C(=NC=N1)N=CN2

Pyrimidine, 98+%

CAS: 289-95-2 Molecular Formula: C4H4N2 Molecular Weight (g/mol): 80.09 MDL Number: MFCD00006059 InChI Key: CZPWVGJYEJSRLH-UHFFFAOYSA-N Synonym: 1,3-diazine,metadiazine,m-diazine,miazine,1,3-diazabenzene,base,1,3-diazin,pyrimidin,unii-k8cxk5q32l,k8cxk5q32l PubChem CID: 9260 ChEBI: CHEBI:16898 IUPAC Name: pyrimidine SMILES: C1=CN=CN=C1

Furan-2-boronic acid, 97%

CAS: 13331-23-2 Molecular Formula: C4H5BO3 Molecular Weight (g/mol): 111.891 MDL Number: MFCD00799544 InChI Key: PZJSZBJLOWMDRG-UHFFFAOYSA-N Synonym: 2-furanboronic acid,furan-2-boronic acid,2-furylboronic acid,2-furanylboronic acid,furan-2-ylboranediol,furan 2-boronic acid,2-furan boronic acid,furan-2-yl boronic acid,boronic acid, furanyl,2furylboronic acid PubChem CID: 2734357 IUPAC Name: furan-2-ylboronic acid SMILES: B(C1=CC=CO1)(O)O

4-Vinylpyridine, 95%, stabilized

CAS: 100-43-6 Molecular Formula: C7H7N Molecular Weight (g/mol): 105.14 MDL Number: MFCD00006447 InChI Key: KFDVPJUYSDEJTH-UHFFFAOYSA-N Synonym: 4-vinylpyridine,pyridine, 4-ethenyl,pyridine, 4-vinyl,gamma-vinylpyridine,unii-i56g67xm8d,ccris 5240,4vp,4-pyridylethylene,4-vinyl-pyridine,4-vinyl pyridine PubChem CID: 7502 IUPAC Name: 4-ethenylpyridine SMILES: C=CC1=CC=NC=C1

4-Cyanoindole, 99%

CAS: 16136-52-0 Molecular Formula: C9H6N2 Molecular Weight (g/mol): 142.161 MDL Number: MFCD00152045 InChI Key: CEUFGDDOMXCXFW-UHFFFAOYSA-N Synonym: 4-cyanoindole,4-indolecarbonitrile,indole-4-carbonitrile,indole-4-cyano,4-cyano-1h-indole,4-cyano indole,pubchem7327,acmc-209dmi,1h-indol-4-yl cyanide PubChem CID: 3817602 IUPAC Name: 1H-indole-4-carbonitrile SMILES: C1=CC(=C2C=CNC2=C1)C#N

5-Aminoindole, 97%

CAS: 5192-03-0 Molecular Formula: C8H8N2 Molecular Weight (g/mol): 132.17 MDL Number: MFCD00005679 InChI Key: ZCBIFHNDZBSCEP-UHFFFAOYSA-N Synonym: 5-aminoindole,indol-5-ylamine,indole, 5-amino,unii-q732pg0y16,1h-indol-5-ylamine,indole-5-ylamine,5-indolamine,5-amino indole,5-amino-indole PubChem CID: 78867 ChEBI: CHEBI:33067 IUPAC Name: 1H-indol-5-amine SMILES: NC1=CC=C2NC=CC2=C1

4-Vinylpyridine, 95%, stab. with 80 to 150ppm hydroquinone

CAS: 100-43-6 Molecular Formula: C7H7N Molecular Weight (g/mol): 105.14 MDL Number: MFCD00006447 InChI Key: KFDVPJUYSDEJTH-UHFFFAOYSA-N Synonym: 4-vinylpyridine,pyridine, 4-ethenyl,pyridine, 4-vinyl,gamma-vinylpyridine,unii-i56g67xm8d,ccris 5240,4vp,4-pyridylethylene,4-vinyl-pyridine,4-vinyl pyridine PubChem CID: 7502 IUPAC Name: 4-ethenylpyridine SMILES: C=CC1=CC=NC=C1

4-Vinylpyridine, 96%, low polymer, stab. with 100ppm hydroquinone

CAS: 100-43-6 Molecular Formula: C7H7N Molecular Weight (g/mol): 105.14 MDL Number: MFCD00006447 InChI Key: KFDVPJUYSDEJTH-UHFFFAOYSA-N Synonym: 4-vinylpyridine,pyridine, 4-ethenyl,pyridine, 4-vinyl,gamma-vinylpyridine,unii-i56g67xm8d,ccris 5240,4vp,4-pyridylethylene,4-vinyl-pyridine,4-vinyl pyridine PubChem CID: 7502 IUPAC Name: 4-ethenylpyridine SMILES: C=CC1=CC=NC=C1

8-Methylquinoline, 97%

CAS: 611-32-5 Molecular Formula: C10H9N Molecular Weight (g/mol): 143.19 MDL Number: MFCD00006810 InChI Key: JRLTTZUODKEYDH-UHFFFAOYSA-N Synonym: quinoline, 8-methyl,8-methyl-quinoline,ccris 408,8-methyl,o-toluquinoline,8-metyl quinoline,8-methyl quinoline,pubchem5806,acmc-209mpf,dsstox_cid_888 PubChem CID: 11910 ChEBI: CHEBI:48984 IUPAC Name: 8-methylquinoline SMILES: CC1=C2N=CC=CC2=CC=C1

4-Benzylpyridine, 97%, Thermo Scientific™

CAS: 2116-65-6 Molecular Formula: C12H11N Molecular Weight (g/mol): 169.23 MDL Number: MFCD00006443 InChI Key: DBOLXXRVIFGDTI-UHFFFAOYSA-N Synonym: pyridine, 4-phenylmethyl,pyridine, 4-benzyl,4-benzyl-pyridine,gamma-benzylpyridine,.gamma.-benzylpyridine,4-phenylmethyl pyridine,unii-1p29gqm0oh,1p29gqm0oh,4-benzyl pyridine,4-benzylpyridine PubChem CID: 16458 IUPAC Name: 4-benzylpyridine SMILES: C(C1=CC=CC=C1)C1=CC=NC=C1

Medchemexpress LLC Benzyl N-[2-[2-[2-(2-aminoethoxy)ethoxy]ethoxy]ethyl]carbamate | 863973-20-0 | MFCD28155474 | 95.0% | 326.39 g·mol⁻¹ | C16H26N2O5 | 100 MG

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CbzNH-PEG3-CH2CH2NH2 is a Cbz-protected PEG3 amine linker (benzyl N-[2-[2-[2-(2-aminoethoxy)ethoxy]ethoxy]ethyl]carbamate) used as a hydrophilic spacer in bioconjugation. It provides a terminal primary amine for conjugation while the carbobenzyloxy (Cbz) group protects the opposing amine during multistep synthesis. Common applications include linker design for PROTACs, peptide and small-molecule conjugation, and other bioconjugation workflows.

• Provides a hydrophilic PEG3 spacer to improve aqueous solubility.
• Contains a terminal primary amine for standard coupling reactions.
• Includes a Cbz protecting group for orthogonal amine protection.
• Available in research-scale quantities suitable for synthesis and screening.
• Typically supplied with high reported purity; consult the batch COA for exact value.

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