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Building Blocks

8717
Sub Categories
Fluorinated Building Blocks 1834
Heterocyclic Building Blocks 3772
Non-Heterocyclic Building Blocks 3171

  • 5-Iodoisatin

    Purity:
    ≥ 98% (Assay by titration)
    Synonym:
    5-Iodoindole-2,3-dione
    Catalog Number:
    44519
    Purity Limit:
    ≥ 98% (Assay by titration)
    CAS Number:
    20780-76-1
    MDL NO:
    MFCD00016899
    Molecular Formula:
    C8H4INO2
    Molecular Weight:
    273.03
    Specification Sheet SDS

  • 4-Bromoindole-3-carboxaldehyde

    Purity:
    ≥ 96% (GC)
    Synonym:
    4-Bromo-3-formylindole
    Catalog Number:
    44511
    Purity Limit:
    ≥ 96% (GC)
    CAS Number:
    98600-34-1
    MDL NO:
    MFCD05864695
    Molecular Formula:
    C9H6BrNO
    Molecular Weight:
    224.06
    Specification Sheet SDS

  • 6-Chloroisatin

    Purity:
    ≥ 98% (GC)
    Synonym:
    6-Chloroindole-2,3-dione
    Catalog Number:
    44507
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    6341-92-0
    MDL NO:
    MFCD00086347
    Molecular Formula:
    C8H4ClNO2
    Molecular Weight:
    181.58
    Specification Sheet SDS

  • 1-(2,4-Dichlorophenyl)-2-(1-imidazolyl)ethanol

    Purity:
    ≥ 98% (GC)
    Synonym:
    1-[2-(2,4-Dichlorophenyl)-2-hydroxyethyl]imidazole
    Catalog Number:
    44500
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    24155-42-8
    MDL NO:
    MFCD00044708
    Molecular Formula:
    C11H10Cl2N2O
    Molecular Weight:
    257.11
    Specification Sheet SDS

  • 5-Bromo-1-methylisatin

    Purity:
    ≥ 98% (GC)
    Synonym:
    5-Bromo-1-methylindole-2,3-dione
    Catalog Number:
    44505
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    2058-72-2
    MDL NO:
    MFCD00456313
    Molecular Formula:
    C9H6BrNO2
    Molecular Weight:
    240.06
    Specification Sheet SDS

  • 6-Chloroimidazo[1,2-a]pyridine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44504
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    6188-25-6
    MDL NO:
    MFCD05663807
    Molecular Formula:
    C7H5ClN2
    Molecular Weight:
    152.58
    Specification Sheet SDS

  • 2-(4-Chlorophenyl)-1H-indole

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44510
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    1211-35-4
    MDL NO:
    MFCD00047159
    Molecular Formula:
    C14H10ClN
    Molecular Weight:
    227.69
    Specification Sheet SDS

  • 2-Bromospiro[9H-fluorene-9,9'-[9H]xanthene]

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44488
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    899422-06-1
    MDL NO:
    MFCD29050113
    Molecular Formula:
    C25H15BrO
    Molecular Weight:
    411.3
    Specification Sheet SDS

  • 1-Bromo-3-phenylimidazo[1,5-a]pyridine

    Purity:
    ≥ 97% (GC)
    Catalog Number:
    44503
    Purity Limit:
    ≥ 97% (GC)
    CAS Number:
    104202-15-5
    MDL NO:
    MFCD04587511
    Molecular Formula:
    C13H9BrN2
    Molecular Weight:
    273.13
    Specification Sheet SDS

  • 2-Oxo-1-imidazolidinecarbonyl chloride

    Purity:
    ≥ 97% (Assay by titration)
    Synonym:
    1-Chlorocarbonyl-2-imidazolidinone
    Catalog Number:
    44502
    Purity Limit:
    ≥ 97% (Assay by titration)
    CAS Number:
    13214-53-4
    MDL NO:
    MFCD02683529
    Molecular Formula:
    C4H5ClN2O2
    Molecular Weight:
    148.55
    Specification Sheet SDS

  • 2-Chlorothioxanthone

    Hazmat
    Purity:
    ≥ 98% (GC)
    Hazmat
    Catalog Number:
    44492
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    86-39-5
    MDL NO:
    MFCD00005067
    Molecular Formula:
    C13H7ClOS
    Molecular Weight:
    246.71
    Specification Sheet SDS

  • 5-Chlorotryptamine hydrochloride

    Purity:
    ≥ 98%
    Synonym:
    5-Chloro-3-(2-aminoethyl)indole hydrochloride
    Catalog Number:
    44506
    Purity Limit:
    ≥ 98%
    CAS Number:
    942-26-7
    MDL NO:
    MFCD00051990
    Molecular Formula:
    C10H11ClN2·HCl
    Molecular Weight:
    231.12
    Specification Sheet SDS

  • 2,4,5-Tribromoimidazole

    Hazmat
    Purity:
    ≥ 98% (HPLC)
    Hazmat
    Catalog Number:
    44499
    Purity Limit:
    ≥ 98% (HPLC)
    CAS Number:
    2034-22-2
    MDL NO:
    MFCD00005184
    Molecular Formula:
    C3HBr3N2
    Molecular Weight:
    304.77
    Specification Sheet SDS

  • 2,4,5-Triiodo-1H-imidazole

    Hazmat
    Purity:
    ≥ 98% (Assay by titration)
    Hazmat
    Catalog Number:
    44498
    Purity Limit:
    ≥ 98% (Assay by titration)
    CAS Number:
    1746-25-4
    MDL NO:
    MFCD00068812
    Molecular Formula:
    C3HI3N2
    Molecular Weight:
    445.77
    Specification Sheet SDS

  • 4-Iodo-1-(triphenylmethyl)imidazole

    Purity:
    ≥ 99% (HPLC)
    Synonym:
    4-Iodo-1-tritylimidazole
    Catalog Number:
    44497
    Purity Limit:
    ≥ 99% (HPLC)
    CAS Number:
    96797-15-8
    MDL NO:
    MFCD02179542
    Molecular Formula:
    C22H17IN2
    Molecular Weight:
    436.3
    Specification Sheet SDS

  • 4,5-Dichloroimidazole

    Purity:
    ≥ 97% (GC)
    Catalog Number:
    44494
    Purity Limit:
    ≥ 97% (GC)
    CAS Number:
    15965-30-7
    MDL NO:
    MFCD00005195
    Molecular Formula:
    C3H2Cl2N2
    Molecular Weight:
    136.96
    Specification Sheet SDS

  • 3-Iodo-1H-pyrazolo[3,4-d]pyrimidin-4-amine

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    4-Amino-3-iodo-1H-pyrazolo[3,4-d]pyrimidine
    Catalog Number:
    44483
    Purity Limit:
    ≥ 98% (HPLC)
    CAS Number:
    151266-23-8
    MDL NO:
    MFCD03787931
    Molecular Formula:
    C5H4IN5
    Molecular Weight:
    261.03
    Specification Sheet SDS

  • 5-Chloro-1-methylimidazole

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44496
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    872-49-1
    MDL NO:
    MFCD00014505
    Molecular Formula:
    C4H5ClN2
    Molecular Weight:
    116.55
    Specification Sheet SDS

  • Tetraiodo-2-sulfobenzoic anhydride

    Hazmat
    Purity:
    ≥ 95% (Assay by titration)
    Hazmat
    Catalog Number:
    44484
    Purity Limit:
    ≥ 95% (Assay by titration)
    CAS Number:
    1745-83-1
    MDL NO:
    MFCD00059713
    Molecular Formula:
    C7I4O4S
    Molecular Weight:
    687.75
    Specification Sheet SDS

  • 6-Bromoimidazo[1,2-a]pyrimidine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44474
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    865156-68-9
    MDL NO:
    MFCD09261434
    Molecular Formula:
    C6H4BrN3
    Molecular Weight:
    198.02
    Specification Sheet SDS

  • 2-(2-Chlorophenyl)-4,5-diphenylimidazole

    Purity:
    ≥ 98% (HPLC)
    Catalog Number:
    44495
    Purity Limit:
    ≥ 98% (HPLC)
    CAS Number:
    1707-67-1
    MDL NO:
    MFCD00030328
    Molecular Formula:
    C21H15ClN2
    Molecular Weight:
    330.82
    Specification Sheet SDS

  • 2,3-Diphenyl-5-(4-chlorophenyl)tetrazolium chloride

    Purity:
    ≥ 92% (Assay by titration)
    Catalog Number:
    44486
    Purity Limit:
    ≥ 92% (Assay by titration)
    CAS Number:
    10557-51-4
    MDL NO:
    MFCD00060031
    Molecular Formula:
    C19H14Cl2N4
    Molecular Weight:
    369.25
    Specification Sheet SDS

  • 2,5-Dibromoselenophene

    Hazmat
    Purity:
    ≥ 98% (GC)
    Hazmat
    Catalog Number:
    44480
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    1755-36-8
    MDL NO:
    MFCD20257909
    Molecular Formula:
    C4H2Br2Se
    Molecular Weight:
    288.83
    Specification Sheet SDS

  • 4-Chloro-1,3-dioxolan-2-one

    Purity:
    ≥ 95% (GC)
    Synonym:
    4-Chloro-2-oxo-1,3-dioxolane
    Catalog Number:
    44489
    Purity Limit:
    ≥ 95% (GC)
    CAS Number:
    3967-54-2
    MDL NO:
    MFCD00005383
    Molecular Formula:
    C3H3ClO3
    Molecular Weight:
    122.5
    Specification Sheet SDS

  • 3-(4-Chlorobenzal)phthalide

    Purity:
    ≥ 98% (GC)
    Synonym:
    3-(4-Chlorobenzylidene)isobenzofuran-1(3H)-one
    Catalog Number:
    44491
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    20526-97-0
    MDL NO:
    MFCD23115631
    Molecular Formula:
    C15H9ClO2
    Molecular Weight:
    256.69
    Specification Sheet SDS

  • 4-Methoxybenzyl 3-Chloromethyl-7-(2-phenylacetamido)-3-cephem-4-carboxylate

    Purity:
    ≥ 98%
    Synonym:
    3-Chloromethyl-7-(2-phenylacetamido)-3-cephem-4-carboxylic acid4-methoxybenzyl ester
    Catalog Number:
    44490
    Purity Limit:
    ≥ 98%
    CAS Number:
    104146-10-3
    MDL NO:
    MFCD00191253
    Molecular Formula:
    C24H23ClN2O5S
    Molecular Weight:
    486.97
    Specification Sheet SDS

  • 2'-Bromospiro[fluorene-9,9'-xanthene]

    Purity:
    ≥ 97% (GC)
    Catalog Number:
    44475
    Purity Limit:
    ≥ 97% (GC)
    CAS Number:
    1477458-14-2
    MDL NO:
    MFCD31814409
    Molecular Formula:
    C25H15BrO
    Molecular Weight:
    411.3
    Specification Sheet SDS

  • 2,3-Bis(4-chlorophenyl)-5-phenyltetrazolium chloride

    Purity:
    ≥ 98% (HPLC)
    Catalog Number:
    44485
    Purity Limit:
    ≥ 98% (HPLC)
    CAS Number:
    135788-08-8
    MDL NO:
    MFCD00060008
    Molecular Formula:
    C19H13Cl3N4
    Molecular Weight:
    403.69
    Specification Sheet SDS

  • 3,6-Dichloro-1,2,4,5-tetrazine

    Purity:
    ≥ 97% (HPLC)
    Catalog Number:
    44482
    Purity Limit:
    ≥ 97% (HPLC)
    CAS Number:
    106131-61-7
    MDL NO:
    MFCD22042702
    Molecular Formula:
    C2Cl2N4
    Molecular Weight:
    150.95
    Specification Sheet SDS

  • 6-Bromopiperonal

    Purity:
    ≥ 98% (GC)
    Synonym:
    6-Bromo-3,4-methylenedioxybenzaldehyde
    Catalog Number:
    44487
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    15930-53-7
    MDL NO:
    MFCD00022952
    Molecular Formula:
    C8H5BrO3
    Molecular Weight:
    229.03
    Specification Sheet SDS

  • 6,8-Dibromoimidazo[1,2-a]pyrazine

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44479
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    63744-22-9
    MDL NO:
    MFCD08460056
    Molecular Formula:
    C6H3Br2N3
    Molecular Weight:
    276.92
    Specification Sheet SDS

  • 2,7-Dibromospiro[9H-fluorene-9,9'-[9H]xanthene]

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44481
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    198142-65-3
    MDL NO:
    MFCD30342413
    Molecular Formula:
    C25H14Br2O
    Molecular Weight:
    490.19
    Specification Sheet SDS

  • 5-Bromophthalide

    Purity:
    ≥ 98% (GC)
    Synonym:
    5-Bromo-1(3H)-isobenzofuranone
    Catalog Number:
    44477
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    64169-34-2
    MDL NO:
    MFCD01797360
    Molecular Formula:
    C8H5BrO2
    Molecular Weight:
    213.03
    Specification Sheet SDS

  • 6-Bromo-1H-1,2,3-triazolo[4,5-b]pyridine

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    6-Bromo-4-azabenzotriazole
    Catalog Number:
    44473
    Purity Limit:
    ≥ 98% (HPLC)
    CAS Number:
    92276-38-5
    MDL NO:
    MFCD08703628
    Molecular Formula:
    C5H3BrN4
    Molecular Weight:
    199.01
    Specification Sheet SDS

  • 3-Bromo-1H-pyrazolo[3,4-d]pyrimidin-4-amine

    Purity:
    ≥ 97% (HPLC)
    Synonym:
    4-Amino-3-bromo-1H-pyrazolo[3,4-d]pyrimidine
    Catalog Number:
    44472
    Purity Limit:
    ≥ 97% (HPLC)
    CAS Number:
    83255-86-1
    MDL NO:
    MFCD12196922
    Molecular Formula:
    C5H4BrN5
    Molecular Weight:
    214.03
    Specification Sheet SDS

  • 5,6-Dibromo-1,3-benzodioxole

    Purity:
    ≥ 98% (GC)
    Synonym:
    4,5-Dibromo-1,2-methylenedioxybenzene
    Catalog Number:
    44478
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    5279-32-3
    MDL NO:
    MFCD00094476
    Molecular Formula:
    C7H4Br2O2
    Molecular Weight:
    279.92
    Specification Sheet SDS

  • 4-Bromophthalimide

    Purity:
    ≥ 98% (HPLC)
    Catalog Number:
    44476
    Purity Limit:
    ≥ 98% (HPLC)
    CAS Number:
    6941-75-9
    MDL NO:
    MFCD00466049
    Molecular Formula:
    C8H4BrNO2
    Molecular Weight:
    226.03
    Specification Sheet SDS

  • 7-Bromopyrrolo[2,1-f][1,2,4]triazin-4-amine

    Purity:
    ≥ 95% (GC)
    Synonym:
    4-Amino-7-bromopyrrolo[2,1-f][1,2,4]triazine
    Catalog Number:
    44469
    Purity Limit:
    ≥ 95% (GC)
    CAS Number:
    937046-98-5
    MDL NO:
    MFCD09033848
    Molecular Formula:
    C6H5BrN4
    Molecular Weight:
    213.04
    Specification Sheet SDS

  • 2-Bromo-9H-thioxanthen-9-one

    Purity:
    ≥ 96% (GC)
    Synonym:
    2-Bromothioxanthone
    Catalog Number:
    44470
    Purity Limit:
    ≥ 96% (GC)
    CAS Number:
    20077-10-5
    MDL NO:
    MFCD00093494
    Molecular Formula:
    C13H7BrOS
    Molecular Weight:
    291.16
    Specification Sheet SDS

  • 3-(2-Chloroethyl)-6,7,8,9-tetrahydro-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44465
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    63234-80-0
    MDL NO:
    MFCD06200813
    Molecular Formula:
    C11H15ClN2O
    Molecular Weight:
    226.7
    Specification Sheet SDS

  • Methyl 5-bromo-2-furancarboxylate

    Purity:
    ≥ 98% (GC)
    Synonym:
    Methyl 5-bromo-2-furoate
    Catalog Number:
    44462
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    2527-99-3
    MDL NO:
    MFCD00092313
    Molecular Formula:
    C6H5BrO3
    Molecular Weight:
    205.01
    Specification Sheet SDS

  • tert-Butyl (R)-2-(2,6-dichlorophenyl)-5-oxo-3-[(R)-1-phenylethyl]imidazolidine-1-carboxylate

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    (R)-3-(tert-Butoxycarbonyl)-2-(2,6-dichlorophenyl)-1-[(R)-1-phenylethyl]imidazolidin-4-one
    Catalog Number:
    44467
    Purity Limit:
    ≥ 98% (HPLC)
    CAS Number:
    1004755-00-3
    MDL NO:
    MFCD30187600
    Molecular Formula:
    C22H24Cl2N2O3
    Molecular Weight:
    435.35
    Specification Sheet SDS

  • 3-(2-Chloroethyl)-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one

    Purity:
    ≥ 98% (GC)
    Catalog Number:
    44466
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    41078-70-0
    MDL NO:
    MFCD03085747
    Molecular Formula:
    C11H11ClN2O
    Molecular Weight:
    222.67
    Specification Sheet SDS

  • Carbazole-9-carbonyl chloride

    Purity:
    ≥ 98% (GC)
    Synonym:
    9-(Chlorocarbonyl)carbazole
    Catalog Number:
    44440
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    73500-82-0
    MDL NO:
    MFCD00059689
    Molecular Formula:
    C13H8ClNO
    Molecular Weight:
    229.66
    Specification Sheet SDS

  • 4-Bromospiro[fluorene-9,9'-xanthene]

    Purity:
    ≥ 98% (GC)
    Synonym:
    4-Bromospiro[9H-fluorene-9,9'-[9H]xanthene]
    Catalog Number:
    44471
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    1609484-45-8
    MDL NO:
    MFCD32065723
    Molecular Formula:
    C25H15BrO
    Molecular Weight:
    411.3
    Specification Sheet SDS

  • 2-Bromofuran (stabilized with CaO)

    Hazmat
    Purity:
    ≥ 98% (GC)
    Hazmat
    Catalog Number:
    44456
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    584-12-3
    MDL NO:
    MFCD00216609
    Molecular Formula:
    C4H3BrO
    Molecular Weight:
    146.97
    Specification Sheet SDS

  • 5-Bromo-2-furaldehyde

    Purity:
    ≥ 98% (GC)
    Synonym:
    5-Bromofurfural
    Catalog Number:
    44463
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    1899-24-7
    MDL NO:
    MFCD00159501
    Molecular Formula:
    C5H3BrO2
    Molecular Weight:
    174.98
    Specification Sheet SDS

  • tert-Butyl (S)-2-(2,6-dichlorophenyl)-5-oxo-3-[(S)-1-phenylethyl]imidazolidine-1-carboxylate

    Purity:
    ≥ 98% (HPLC)
    Synonym:
    (S)-3-(tert-Butoxycarbonyl)-2-(2,6-dichlorophenyl)-1-[(S)-1-phenylethyl]imidazolidin-4-one
    Catalog Number:
    44468
    Purity Limit:
    ≥ 98% (HPLC)
    CAS Number:
    1149765-08-1
    MDL NO:
    MFCD30187601
    Molecular Formula:
    C22H24Cl2N2O3
    Molecular Weight:
    435.35
    Specification Sheet SDS

  • 4-Bromo-2-furaldehyde

    Purity:
    ≥ 97% (GC)
    Synonym:
    4-Bromofurfural
    Catalog Number:
    44461
    Purity Limit:
    ≥ 97% (GC)
    CAS Number:
    21921-76-6
    MDL NO:
    MFCD00671504
    Molecular Formula:
    C5H3BrO2
    Molecular Weight:
    174.98
    Specification Sheet SDS

  • 3-Bromo-2-furaldehyde

    Purity:
    ≥ 98% (GC)
    Synonym:
    3-Bromofuran-2-carboxaldehyde
    Catalog Number:
    44464
    Purity Limit:
    ≥ 98% (GC)
    CAS Number:
    14757-78-9
    MDL NO:
    MFCD07368224
    Molecular Formula:
    C5H3BrO2
    Molecular Weight:
    174.98
    Specification Sheet SDS
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