Ligand families

Navigate small molecules by ligand family or scaffold to build focused sets and explore structure–activity relationships. This category groups related chemotypes, helping you select analogs, fragments, and tool molecules for discovery research.

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  1. N₃-PEG₄-CH₂CH₂COOtBu
    CAS: 581066-04-8 Formula: C15H29N3O6 Molecular Weight: 347.41
    Liquid ≥97%
    ● In Stock — US warehouse, ships to EU* Item #: N122165
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    Technical Identifiers
    IUPAC Name
    tert-butyl 3-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethoxy]propanoate
    SMILES
    CC(C)(C)OC(=O)CCOCCOCCOCCOCCN=[N+]=[N-]
    InChIKey
    KUOGRGKKXWMJFM-UHFFFAOYSA-N
    InChI
    1S/C15H29N3O6/c1-15(2,3)24-14(19)4-6-20-8-10-22-12-13-23-11-9-21-7-5-17-18-16/h4-13H2,1-3H3
    Synonyms
    N3-PEG4- CH2CH2COOtBu | E79908 | DTXSID601190858 | HY-140777 | AKOS040741248 | 1,1-Dimethylethyl 15-azido-4,7,10,13-t...
  2. Fmoc-NH-(PEG)₉-CH₂CH₂COOH
    CAS: 1191064-81-9 Formula: C36H53NO13 Molecular Weight: 707.8
    ◐ .Made to order · 8–12 wks Item #: F122103
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    Technical Identifiers
    IUPAC Name
    3-[2-[2-[2-[2-[2-[2-[2-[2-[2-(9H-fluoren-9-ylmethoxycarbonylamino)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propanoic acid
    SMILES
    C1=CC=C2C(=C1)C(C3=CC=CC=C32)COC(=O)NCCOCCOCCOCCOCCOCCOCCOCCOCCOCCC(=O)O
    InChIKey
    NEESTRVILHNOJT-UHFFFAOYSA-N
    InChI
    1S/C36H53NO13/c38-35(39)9-11-41-13-15-43-17-19-45-21-23-47-25-27-49-28-26-48-24-22-46-20-18-44-16-14-42-12-10-37-36(40)50-29-34-32-7-3-1-5-30(32)31-6-show more
  3. Thalidomide-O-PEG2-propargyl
    CAS: 2098487-52-4 PubChem CID: 131988624 Formula: C20H20N2O7 Molecular Weight: 400.38
    ● In Stock — US warehouse, ships to EU* Item #: T286891
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    IUPAC Name
    2-(2,6-dioxopiperidin-3-yl)-4-[2-(2-prop-2-ynoxyethoxy)ethoxy]isoindole-1,3-dione
    SMILES
    C#CCOCCOCCOC1=CC=CC2=C1C(=O)N(C2=O)C3CCC(=O)NC3=O
    InChIKey
    XJWGDRINRIEEJD-UHFFFAOYSA-N
    InChI
    1S/C20H20N2O7/c1-2-8-27-9-10-28-11-12-29-15-5-3-4-13-17(15)20(26)22(19(13)25)14-6-7-16(23)21-18(14)24/h1,3-5,14H,6-12H2,(H,21,23,24)
    Synonyms
    Thalidomide-linker5 | Thalidomide-O-PEG2-propargyl | E3 ligase Ligand-Linker Conjugates 32 | 2-(2,6-Dioxo-3-piperidin...
  4. Thalidomide-O-amido-PEG3-NH2 hydrochloride
    CAS: 2245697-84-9 PubChem CID: 134160246 Formula: C23H30N4O9.HCl Molecular Weight: 542.97
    ● In Stock — US warehouse, ships to EU* Item #: T287614
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    Technical Identifiers
    IUPAC Name
    N-[2-[2-[2-(2-aminoethoxy)ethoxy]ethoxy]ethyl]-2-[2-(2,6-dioxopiperidin-3-yl)-1,3-dioxoisoindol-4-yl]oxyacetamide;hydrochloride
    SMILES
    C1CC(=O)NC(=O)C1N2C(=O)C3=C(C2=O)C(=CC=C3)OCC(=O)NCCOCCOCCOCCN.Cl
    InChIKey
    ORRMBTUTYKQYQU-UHFFFAOYSA-N
    InChI
    1S/C23H30N4O9.ClH/c24-6-8-33-10-12-35-13-11-34-9-7-25-19(29)14-36-17-3-1-2-15-20(17)23(32)27(22(15)31)16-4-5-18(28)26-21(16)30;/h1-3,16H,4-14,24H2,(H,show more
    Synonyms
    Thalidomide - linker 1 | N-[2-[2-[2-(2-Aminoethoxy)ethoxy]ethoxy]ethyl]-2-[[2-(2,6-dioxo-3-piperidinyl)-2,3-dihydro-1...
  5. Thalidomide 4'-oxyacetamide-alkylC1-PEG3-alkylC3-amine hydrochloride
    CAS: 2564466-93-7 PubChem CID: 154828674 Formula: C25H34N4O9.HCl Molecular Weight: 571.02
    ● In Stock — US warehouse, ships to EU* Item #: T287206
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    Technical Identifiers
    IUPAC Name
    N-[3-[2-[2-(3-aminopropoxy)ethoxy]ethoxy]propyl]-2-[2-(2,6-dioxopiperidin-3-yl)-1,3-dioxoisoindol-4-yl]oxyacetamide;hydrochloride
    SMILES
    C1CC(=O)NC(=O)C1N2C(=O)C3=C(C2=O)C(=CC=C3)OCC(=O)NCCCOCCOCCOCCCN.Cl
    InChIKey
    BDDPTKKUZMIBGC-UHFFFAOYSA-N
    InChI
    1S/C25H34N4O9.ClH/c26-8-2-10-35-12-14-37-15-13-36-11-3-9-27-21(31)16-38-19-5-1-4-17-22(19)25(34)29(24(17)33)18-6-7-20(30)28-23(18)32;/h1,4-5,18H,2-3,6show more
    Synonyms
    N-[3-[2-[2-(3-Aminopropoxy)ethoxy]ethoxy]propyl]-2-[[2-(2,6-dioxo-3-piperidinyl)-2,3-dihydro-1,3-dioxo-1H-isoindol-4-...
  6. Thalidomide-O-amido-PEG2-C2-NH2 hydrochloride
    CAS: 2376990-30-4 EC Number: 961-883-4 PubChem CID: 145874885 Formula: C21H26N4O8.HCl Molecular Weight: 498.92
    ● In Stock — US warehouse, ships to EU* Item #: T288484
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    Technical Identifiers
    IUPAC Name
    N-[2-[2-(2-aminoethoxy)ethoxy]ethyl]-2-[2-(2,6-dioxopiperidin-3-yl)-1,3-dioxoisoindol-4-yl]oxyacetamide;hydrochloride
    SMILES
    C1CC(=O)NC(=O)C1N2C(=O)C3=C(C2=O)C(=CC=C3)OCC(=O)NCCOCCOCCN.Cl
    InChIKey
    CPJQBYYTYFGXKD-UHFFFAOYSA-N
    InChI
    1S/C21H26N4O8.ClH/c22-6-8-31-10-11-32-9-7-23-17(27)12-33-15-3-1-2-13-18(15)21(30)25(20(13)29)14-4-5-16(26)24-19(14)28;/h1-3,14H,4-12,22H2,(H,23,27)(H,show more
    Synonyms
    Thalidomide - linker 14 | N-[2-[2-(2-Aminoethoxy)ethoxy]ethyl]-2-[[2-(2,6-dioxo-3-piperidinyl)-2,3-dihydro-1,3-dioxo-...
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Frequently Asked Questions

What should I consider when selecting Ligand families?
When selecting Ligand families, consider the metal precursor, substrate class, and whether the reaction is sensitive to air or moisture. Ligand-to-metal ratio and preformed versus in-situ complex formation often matter as much as the ligand identity.
What does Ligand families cover?
Ligand families is a top-level listing in our catalogue. Use the filters and search on the listing page to narrow by the attributes that matter for your work, or browse the neighbouring categories from the main navigation.
Which data should I check before ordering Ligand families?
Check assay purity for the Ligand families lot, chiral purity where applicable, and appearance, and confirm storage temperature and atmosphere. Oxidised ligand is a common and easily missed cause of failed catalysis. All products are supplied for professional research and development use only, and are not for use in humans, animals, diagnostics, or therapy.
Can I search Ligand families by structure or chirality?
Yes — filter Ligand families by ligand class and chirality, and search by CAS number or SMILES. For preformed metal complexes, bulk quantities, or ligands not listed, contact [email protected].

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