Heterocyclic Building Blocks

Indole-3-carboxaldehyde 97%, ACROS Organics™

Chemical Name or Material: Indole-3-carboxaldehyde Name Note: 97% CAS: 487-89-8 Assay: ≥96.0% Assay Percent Range: 97% Molecular Formula: C9H7NO Formula Weight: 145.16 MDL Number: MFCD00005622 5GR Indole-3-carboxaldehyde, 97%

Alfa Aesar™ (+/-)-1-Boc-3-aminopyrrolidine, 96%

Chemical Name or Material: (+/-)-1-Boc-3-aminopyrrolidine CAS: 186550-13-0 Molecular Formula: C9H18N2O2 Formula Weight: 186.25 MDL Number: MFCD01861220 UN Number: UN2735 Synonym: (+/-)-1-tert-Butoxycarbonyl-3-aminopyrrolidine; tert-Butyl 3-aminopyrrolidine-1-carboxylate (±)-1-BOC-3-AMINOPYRROLID INE, 96% 1G

2-Chloro-4-aminopyridine, 97%, ACROS Organics™

Chemical Name or Material: 2-Chloro-4-pyridinamine CAS: 14432-12-3 CAS Min %: 96.0 CAS Max %: 100.0 Assay: ≥96.0% Assay Percent Range: 97% Molecular Formula: C5H5ClN2 Formula Weight: 128.56 5GR 2-Chloro-4-aminopyridine, 97%

Alfa Aesar™ 2,4-Dichloronicotinic acid, 97%

Chemical Name or Material: 2,4-Dichloronicotinic acid CAS: 262423-77-8 Molecular Formula: C6H3Cl2NO2 Formula Weight: 192 MDL Number: MFCD06796292 Synonym: 2,4-Dichloropyridine-3-carboxylic acid 250MG 2,4-Dichloronicotinic acid, 97% 250mg

Alfa Aesar™ Benzo[b]thiophene 1,1-dioxide, 98%

Chemical Name or Material: Benzo[b]thiophene 1,1-dioxide CAS: 825-44-5 Molecular Formula: C8H6O2S Formula Weight: 166.2 MDL Number: MFCD00052178 Beilstein: 116442 Synonym: Thianaphthene 1,1-dioxide THIANAPHTHENE-1,1-DIOXIDE,98%,25G

4-Pyrazolecarboxylic acid, 97%, ACROS Organics™

Chemical Name or Material: 4-Pyrazolecarboxylic acid CAS: 37718-11-9 CAS Min %: 96.0 CAS Max %: 100.0 Assay: ≥96.0% Assay Percent Range: 97% Molecular Formula: C4H4N2O2 Formula Weight: 112.09 MDL Number: MFCD00011558 500MG 4-Pyrazolecarboxylic acid, 97%

Alfa Aesar™ N-(2-Chloro-3-pyridyl)maleimide

Chemical Name or Material: N-(2-Chloro-3-pyridyl)maleimide CAS: 278610-39-2 Molecular Formula: C9H5ClN2O2 Formula Weight: 208.61 MDL Number: MFCD00111928 Synonym: N-(2-Chloropyridin-3-yl)maleimide N-(2-CHLOROPYRIDIN-3-YL)MALEIMIDE5G

Alfa Aesar™ 6-Methyl-1,2,3,4-tetrahydroquinoline, 98%

Chemical Name or Material: 6-Methyl-1,2,3,4-tetrahydroquinoline CAS: 91-61-2 Molecular Formula: C10H13N Formula Weight: 147.22 MDL Number: MFCD00023887 Beilstein: 122515 6-METHYL-1,2,3,4-TETRAHYDROQUINOLINE, 98%,50G

Alfa Aesar™ 2,3-Dichloropyridine, 99%

Chemical Name or Material: 2,3-Dichloropyridine CAS: 2402-77-9 Molecular Formula: C5H3Cl2N Formula Weight: 147.99 MDL Number: MFCD00006229 UN Number: UN2811 Beilstein: 109811 2,3-DICHLOROPYRIDINE, 99% 5G

Alfa Aesar™ Iminostilbene, 97%

Chemical Name or Material: Iminostilbene CAS: 256-96-2 Molecular Formula: C14H11N Formula Weight: 193.25 MDL Number: MFCD00005071 Beilstein: 1343358 Synonym: 5H-Dibenz[b,f]azepine IMINOSTILBENE, 97% 25G

Alfa Aesar™ Bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxylic dianhydride, 97%

Chemical Name or Material: Bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxylic dianhydride CAS: 1719-83-1 Molecular Formula: C12H8O6 Formula Weight: 248.19 MDL Number: MFCD00082228 Beilstein: 294213 BICYCLO(2.2.2)OCT-7-ENE-2,3,5,6-TETRACARBOX.ACID10

Alfa Aesar™ Methyl 3-methoxythiophene-2-carboxylate, 97%

Chemical Name or Material: Methyl 3-methoxythiophene-2-carboxylate CAS: 62353-75-7 Molecular Formula: C7H8O3S Formula Weight: 172.2 MDL Number: MFCD00102115 Synonym: 3-Methoxythiophene-2-carboxylic acid methyl ester METHYL 3-METHOXYTHIOPHENE-2-CARBOXYLATE, 97%,1G

Alfa Aesar™ 4-Cyanopyridine, 98%

Chemical Name or Material: 4-Cyanopyridine CAS: 100-48-1 Molecular Formula: C6H4N2 Formula Weight: 104.11 MDL Number: MFCD00006417 Beilstein: 107712 Synonym: Isonicotinonitrile; Pyridine-4-carbonitrile 4-CYANOPYRIDINE, 98%10G

Alfa Aesar™ (+/-)-1-Boc-2-(aminomethyl)pyrrolidine, tech. 85%

Chemical Name or Material: (+/-)-1-Boc-2-(aminomethyl)pyrrolidine CAS: 177911-87-4 Purity Grade: Technical Grade Molecular Formula: C10H20N2O2 Formula Weight: 200.28 MDL Number: MFCD01317793 UN Number: UN2735 Synonym: (+/-)-1-tert-Butoxycarbonyl-2-(aminomethyl)pyrrolidine; tert-Butyl 2-(aminomethyl)pyrrolidine-1-carboxylate (±)-1-BOC-2-(AMINOMETHYL) PYRROLIDINE, 97% 5G

Alfa Aesar™ 2,4-Diamino-5-fluoroquinazoline, 97%

Chemical Name or Material: 2,4-Diamino-5-fluoroquinazoline CAS: 119584-70-2 Molecular Formula: C8H7FN4 Formula Weight: 178.17 MDL Number: MFCD00221785 Beilstein: 3590571 Synonym: 5-Fluoroquinazoline-2,4-diamine 2,4-DIAMINO-5-FLUOROQUINAZOLINE, 97%,1G

Alfa Aesar™ Methyl 4,5-dibromo-3-hydroxythiophene-2-carboxylate, 97%

Chemical Name or Material: Methyl 4,5-dibromo-3-hydroxythiophene-2-carboxylate CAS: 96232-71-2 Molecular Formula: C6H4Br2O3S Formula Weight: 316.89 MDL Number: MFCD00052082 Synonym: 4,5-Dibromo-3-hydroxythiophene-2-carboxylic acid methyl ester METHYL 4,5-DIBROMO-3-HYDROXYTHIOPHENE-2CARB,5G

Alfa Aesar™ Tetrachlorothiophene, 98%

Chemical Name or Material: Tetrachlorothiophene CAS: 6012-97-1 Molecular Formula: C4Cl4S Formula Weight: 221.92 MDL Number: MFCD00005422 UN Number: UN2811 Beilstein: 118374 1GR Tetrachlorothiophene, 98%

Alfa Aesar™ Ethyl 2-amino-4-methylthiazole-5-carboxylate, 97%

Chemical Name or Material: Ethyl 2-amino-4-methylthiazole-5-carboxylate CAS: 7210-76-6 Molecular Formula: C7H10N2O2S Formula Weight: 186.22 MDL Number: MFCD00123414 Synonym: 2-Amino-4-methylthiazole-5-carboxylic acid ethyl ester ETHYL 2-AMINO-4-METHYLTHIAZOLE-5-CARBOXYLATE,25G

1,3,3-Trimethyl-2-methyleneindoline 98.5%, ACROS Organics™

Chemical Name or Material: 1, 3, 3-Trimethyl-2-methyleneindoline Name Note: 98.5% CAS: 118-12-7 CAS Min %: 98.0 CAS Max %: 100.0 Assay: 98.5% Assay Percent Range: 98.50% Molecular Formula: C12H15N Formula Weight: 173.26 MDL Number: MFCD00005813 Synonym: Fischers base 250GR 1,3,3-Trimethyl-2-methyleneindoline, 98.5%

Alfa Aesar™ 4-(2-Chlorophenyl)tetrahydropyran-4-carboxaldehyde, 98%

Chemical Name or Material: 4-(2-Chlorophenyl)tetrahydropyran-4-carboxaldehyde CAS: 902836-47-9 Molecular Formula: C12H13ClO2 Formula Weight: 224.69 MDL Number: MFCD08061003 4-(2-CHLOROPHENYL)TETRAHYDRO-2H-PYRAN-4-CARBOXAL-1

Alfa Aesar™ 3-(Acetamidomethyl)pyridine, 97%

Chemical Name or Material: 3-(Acetamidomethyl)pyridine CAS: 22977-34-0 Molecular Formula: C8H10N2O Formula Weight: 150.18 MDL Number: MFCD00495392 3-(ACETAMIDOMETHYL)PYRIDINE, 97%,2,5G

Alfa Aesar™ Methyl 3-methylbenzo[b]thiophene-2-carboxylate, 97%

Chemical Name or Material: Methyl 3-methylbenzo[b]thiophene-2-carboxylate CAS: 3133-81-1 Molecular Formula: C11H10O2S Formula Weight: 206.26 MDL Number: MFCD02683110 Synonym: 3-Methylbenzo[b]thiophene-2-carboxylic acid methyl ester; Methyl 3-methylthianaphthene-2-carboxylate METHYL 3-METHYLBENZO(B)THIOPHENE-2-CARBOXYL,5G

Alfa Aesar™ 2-Methyl-4-(trifluoromethyl)thiazole-5-carboxylic acid, 98%

Chemical Name or Material: 2-Methyl-4-(trifluoromethyl)thiazole-5-carboxylic acid CAS: 117724-63-7 Formula Weight: 211.16 MDL Number: MFCD00173295 Beilstein: 9848326 1GR 2-Methyl-4-(trifluoromethyl)thiazole-5-carboxylic acid, 98% 1g

Alfa Aesar™ 2,3-Dibromopyridine-4-carboxylic acid, 97%

Chemical Name or Material: 2,3-Dibromopyridine-4-carboxylic acid CAS: 1020056-98-7 Molecular Formula: C6H3Br2NO2 Formula Weight: 280.9 MDL Number: MFCD09997708 Synonym: 2,3-Dibromoisonicotinic acid 1GR 2,3-Dibromopyridine-4-carboxylic acid, 97% 1g

Alfa Aesar™ 2-Amino-5-trifluoromethyl-1,3,4-thiadiazole, 98%

Chemical Name or Material: 2-Amino-5-trifluoromethyl-1,3,4-thiadiazole CAS: 10444-89-0 Molecular Formula: C3H2F3N3S Formula Weight: 169.13 MDL Number: MFCD00003109 Beilstein: 513140 2-AMINO-5-TRIFLUOROMETHYL-1,3,4-THIADIAZOLE, 98%25

Alfa Aesar™ 2-Chloro-N-(4-fluorophenyl)pyridine-4-carboxamide, 95%

Chemical Name or Material: 2-Chloro-N-(4-fluorophenyl)pyridine-4-carboxamide CAS: 1019383-51-7 Molecular Formula: C12H8ClFN2O Formula Weight: 250.65 MDL Number: MFCD11128638 Synonym: 2-Chloro-N-(4-fluorophenyl)isonicotinamide 250MG 2-Chloro-N-(4-fluorophenyl)pyridine-4-carboxamide, 95% 250mg

Alfa Aesar™ 5-(4-Bromophenyl)-1H-tetrazole, 97%

Chemical Name or Material: 5-(4-Bromophenyl)-1H-tetrazole CAS: 50907-23-8 Molecular Formula: C7H5BrN4 Formula Weight: 225.05 MDL Number: MFCD00991874 Beilstein: 141235 5-(4-BROMOPHENYL)-1H-TETRAZOLE, 97%,250MG

Alfa Aesar™ Ethyl 5-methylindole-2-carboxylate, 99%

Chemical Name or Material: Ethyl 5-methylindole-2-carboxylate CAS: 16382-15-3 Molecular Formula: C12H13NO2 Formula Weight: 203.24 MDL Number: MFCD00022703 Beilstein: 159437 Synonym: 5-Methylindole-2-carboxylic acid ethyl ester ETHYL 5-METHYLINDOLE-2-CARBOXYLATE, 99%,5G

Alfa Aesar™ Methyl 2-bromothiazole-5-carboxylate, 98%

Chemical Name or Material: Methyl 2-bromothiazole-5-carboxylate CAS: 54045-74-8 Molecular Formula: C5H4BrNO2S Formula Weight: 222.05 MDL Number: MFCD03788565 Synonym: 2-Bromothiazole-5-carboxylic acid methyl ester METHYL 2-BROMOTHIAZOLE-5-CARBOXYLATE, 98% 1G

Alfa Aesar™ 2,6-Difluoropyridine, 98+%

Chemical Name or Material: 2,6-Difluoropyridine CAS: 1513-65-1 Molecular Formula: C5H3F2N Formula Weight: 115.08 MDL Number: MFCD00006227 UN Number: UN1993 Beilstein: 1422549 2,6-DIFLUOROPYRIDINE, 95+%100G

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