Find heterocyclic building blocks used in drug discovery, library design, and synthetic route planning. Compare ring systems and functionalized intermediates for efficient scaffold assembly.
Heterocyclic Building Blocks
Browse by type, application, or key specifications such as purity, grade, packaging, and handling requirements.
94,557 products
Browse by workflow
Popular Products
- 1-VinylimidazoleLiquid ≥99%In Stock Item #: V109377View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-ethenylimidazole
- SMILES
- C=CN1C=CN=C1
- InChIKey
- OSSNTDFYBPYIEC-UHFFFAOYSA-N
- InChI
- 1S/C5H6N2/c1-2-7-4-3-6-5-7/h2-5H,1H2
- Synonyms
- N-VINYL IMIDAZOLE [INCI] | 1-ethenylimidazole | 1H-Imidazole, 1-ethenyl- | 1-Subsituted 1H-imidazole, 8 | 1-Vinylimid...
- 1-methyl-2-oxo-1，2-dihydropyridine-4-carboxylicacidCAS: 33972-97-3 Formula: C7H7NO3 Molecular Weight: 153.135In Stock Item #: M133660View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-methyl-2-oxopyridine-4-carboxylic acid
- SMILES
- CN1C=CC(=CC1=O)C(=O)O
- InChIKey
- XUKWOJNDLIOXSC-UHFFFAOYSA-N
- InChI
- 1S/C7H7NO3/c1-8-3-2-5(7(10)11)4-6(8)9/h2-4H,1H3,(H,10,11)
- Synonyms
- DTXSID20356132 | BB 0237061 | MFCD03701415 | J-504913 | 1-methylpyrid-2-one-4-carboxylic acid | AMY12074 | FS-2299 | ...
- RutaecarpineIn Stock Item #: R107338View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 3,13,21-triazapentacyclo[11.8.0.02,10.04,9.015,20]henicosa-1(21),2(10),4,6,8,15,17,19-octaen-14-one
- SMILES
- C1CN2C(=NC3=CC=CC=C3C2=O)C4=C1C5=CC=CC=C5N4
- InChIKey
- ACVGWSKVRYFWRP-UHFFFAOYSA-N
- InChI
- 1S/C18H13N3O/c22-18-13-6-2-4-8-15(13)20-17-16-12(9-10-21(17)18)11-5-1-3-7-14(11)19-16/h1-8,19H,9-10H2
- Synonyms
- C18H13N3O | SMR001230721 | RUTECARPINE [MI] | Indolo[2',4]pyrido[2,1-b]quinazolin-5(7H)-one, 8,13-dihydro- | Rutaecar...
- [(3R)-1-methylpyrrolidin-3-yl]methanolIn Stock Item #: R172594View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- [(3R)-1-methylpyrrolidin-3-yl]methanol
- SMILES
- CN1CCC(C1)CO
- InChIKey
- NPWMWLAPRVMNBN-ZCFIWIBFSA-N
- InChI
- 1S/C6H13NO/c1-7-3-2-6(4-7)5-8/h6,8H,2-5H2,1H3/t6-/m1/s1
- Synonyms
- (R)-(1-Methyl-pyrrolidin-3-yl)-methanol | (R)-(1-Methylpyrrolidin-3-yl)methanol | (3R)-1-Methyl-3-Pyrrolidinemethanol...
- Quinoxaline-5-carboxylic acidIn Stock Item #: Q347112View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- quinoxaline-5-carboxylic acid
- SMILES
- C1=CC(=C2C(=C1)N=CC=N2)C(=O)O
- InChIKey
- QLZNISOPACYKOR-UHFFFAOYSA-N
- InChI
- 1S/C9H6N2O2/c12-9(13)6-2-1-3-7-8(6)11-5-4-10-7/h1-5H,(H,12,13)
- Synonyms
- AMY14070 | FT-0647246 | VU0085233-3 | AKOS000270304 | BB 0253150 | SCHEMBL950048 | QUINOXALINE-5-CARBOXYLICACID | BBL...
- Furamidine dihydrochlorideIn Stock Item #: F286803View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-[5-(4-carbamimidoylphenyl)furan-2-yl]benzenecarboximidamide;dihydrochloride
- SMILES
- C1=CC(=CC=C1C2=CC=C(O2)C3=CC=C(C=C3)C(=N)N)C(=N)N.Cl.Cl
- InChIKey
- VXNYQUQHOUERTR-UHFFFAOYSA-N
- InChI
- 1S/C18H16N4O.2ClH/c19-17(20)13-5-1-11(2-6-13)15-9-10-16(23-15)12-3-7-14(8-4-12)18(21)22;;/h1-10H,(H3,19,20)(H3,21,22);2*1H
- Synonyms
- DB 75 | DB75 | NSC 305831 | WR199385 | 4-[5-(4-carbamimidoylphenyl)furan-2-yl]benzenecarboximidamide;dihydrochloride ...
- Folic acidMoligand™ ? Moligand™ — Aladdin's line of ligands and bioactive small molecules. Use for receptor, pathway, and binding studies needing defined small-molecule tools. ≥97%(HPLC)In Stock Item #: F103635View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2S)-2-[[4-[(2-amino-4-oxo-3H-pteridin-6-yl)methylamino]benzoyl]amino]pentanedioic acid
- SMILES
- C1=CC(=CC=C1C(=O)NC(CCC(=O)O)C(=O)O)NCC2=CN=C3C(=N2)C(=O)NC(=N3)N
- InChIKey
- OVBPIULPVIDEAO-LBPRGKRZSA-N
- InChI
- show more
- Synonyms
- .beta.-D-Allopyranose, 1,6-anhydro-2,3-di-O-methyl-4-O-(phenylmethyl)- | CHEBI:27470 | DTXCID102519 | Foldine (France...
- 5-Amino-tetrazole-monohydrateIn Stock Item #: A138292View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2H-tetrazol-5-amine;hydrate
- SMILES
- C1(=NNN=N1)N.O
- InChIKey
- JVSMPWHQUPKRNV-UHFFFAOYSA-N
- InChI
- 1S/CH3N5.H2O/c2-1-3-5-6-4-1;/h(H3,2,3,4,5,6);1H2
- Synonyms
- CH5N5O | NSC 83799 | NSC-84239 | SCHEMBL808521 | JVSMPWHQUPKRNV-UHFFFAOYSA-N | MFCD00149327 | 5-Aminotetrazole hydrat...
- 5-AminobenzimidazoleSolid ≥98%(HPLC)In Stock Item #: A151159View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 3H-benzimidazol-5-amine
- SMILES
- C1=CC2=C(C=C1N)NC=N2
- InChIKey
- WFRXSXUDWCVSPI-UHFFFAOYSA-N
- InChI
- 1S/C7H7N3/c8-5-1-2-6-7(3-5)10-4-9-6/h1-4H,8H2,(H,9,10)
- Synonyms
- 1H-Benzimidazol-6-amine | 3H-benzimidazol-5-ylamine | 5-aminobenzimidazole, AldrichCPR | MFCD00465258 | NSC 231612 | ...
- 3-Fluoro-4-(piperidin-3-yl)pyridine dihydrochlorideIn Stock Item #: F343384View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 3-fluoro-4-piperidin-3-ylpyridine;dihydrochloride
- SMILES
- C1CC(CNC1)C2=C(C=NC=C2)F.Cl.Cl
- InChIKey
- ZNBYPLGGAITAKE-UHFFFAOYSA-N
- InChI
- 1S/C10H13FN2.2ClH/c11-10-7-13-5-3-9(10)8-2-1-4-12-6-8;;/h3,5,7-8,12H,1-2,4,6H2;2*1H
- 2-Aminothiazole-5-carbonitrileIn Stock Item #: W133465View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-amino-1,3-thiazole-5-carbonitrile
- SMILES
- C1=C(SC(=N1)N)C#N
- InChIKey
- YJTBHWXNEMGNDC-UHFFFAOYSA-N
- InChI
- 1S/C4H3N3S/c5-1-3-2-7-4(6)8-3/h2H,(H2,6,7)
- Synonyms
- 5-Thiazolecarbonitrile, 2-amino- | BDBM50590155 | AM20100264 | SY031822 | 2-AMINO-5-CYANOTHIAZOLE | BB 0262833 | EN30...
- 1-TosylpyrozoleSolid ≥98%In Stock Item #: T331282View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-(4-methylphenyl)sulfonylpyrazole
- SMILES
- CC1=CC=C(C=C1)S(=O)(=O)N2C=CC=N2
- InChIKey
- XDFZXGSBGXAPLS-UHFFFAOYSA-N
- InChI
- 1S/C10H10N2O2S/c1-9-3-5-10(6-4-9)15(13,14)12-8-2-7-11-12/h2-8H,1H3
- Synonyms
- 1-(4-Toluenesulfonyl)pyrazole | NSC269428 | NSC-269428 | 1-TOSYLPYRAZOLE | A918497 | STK432193 | AC-13671 | XDFZXGSBG...
![[(3R)-1-methylpyrrolidin-3-yl]methanol](https://www.aladdinsci.com/media/catalog/product/cache/6360e336b2a70951114dbd37294096ee/R/1/R172594.png)
Fast Shipping Same-day shipping on in-stock items
Technical Details Quality & specification info on every product page
Pack Size Options Multiple packaging sizes with pricing access from listing
R&D Use Only Products supplied for research and development use
Frequently Asked Questions
How do I find the right Heterocyclic Building Blocks for my target?
Start with retrosynthetic analysis to identify key disconnections. Filter by functional group, ring system, and protecting group strategy. Match purity grade to your scale — research scale tolerates lower purity than process chemistry.
What specifications matter for Heterocyclic Building Blocks?
Purity (≥95% typical, ≥98% for medicinal chemistry), regioisomer purity, water content for moisture-sensitive groups, stereochemistry for chiral compounds, and pack size. Check storage requirements and shelf life.
Are stereochemically pure variants available?
Yes. For chiral building blocks, enantiomeric and diastereomeric purity ratings are provided. Look for compounds with ≥99% ee for asymmetric synthesis applications.
How can I search for specific structures?
Use the filters by functional group, ring system, halogen content, or molecular weight range. You can also search by CAS number, SMILES string, or molecular formula for exact-match queries.