Shanghai Ascen Chemical Co., Ltd.

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Profile: Shanghai Ascen Chemical Co., Ltd. specializes in developing API & key intermediates. Intermediates of APIs include 1-cyano-4,5-dimethoxybenzocyclobutene, 4H-1-benzopyran-4-one, 8-amino-2-(2H-tetrazol-5-yl), meropenem side chain, 5-hydroxymethylthiazole, boc-L-hydroxyproline and 4-thiazoleacetic acid. Chiral intermediates include (4R)-2,2-dimethyl-1,3-dioxolane-4-methanol, (R)-3-quinuclidinol, (S)-3-aminopyrrolidine, Z-L-alaninol and (R)-1-phenethylamine.

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• (S)-4-Hydroxy-2-pyrrolidone

IUPAC Name: (4S)-4-hydroxypyrrolidin-2-one | CAS Registry Number: 68108-18-9
Synonyms: 4-hydroxypyrrolidin-2-one, 2-Pyrrolidinone, 4-hydroxy-, 479179_ALDRICH, (S)-beta-Hydroxy-gamma-butyrolactam, 2-Pyrrolidinone, 4-hydroxy-, (4S)-, (S)-(−)-4-Hydroxy-2-pyrrolidinone, InChI=1/C4H7NO2/c6-3-1-4(7)5-2-3/h3,6H,1-2H2,(H,5,7

Molecular Formula:	C₄H₇NO₂	Molecular Weight:	101.103880 [g/mol]
H-Bond Donor:	2	H-Bond Acceptor:	2

InChIKey: IOGISYQVOGVIEU-VKHMYHEASA-N

• 1,4-Dithia-7-azaspiro[4,4]nonane-8-carboxylic acid hydrobromide

IUPAC Name: 1,4-dithia-7-azaspiro[4.4]nonane-8-carboxylic acid;hydrobromide | CAS Registry Number: 75776-79-3
Synonyms: AG-H-02101, MolPort-020-001-036, SBB067166, AKOS015904443, I111, A838506, I14-1714, 1,4-Dithia-7-azaspiro[4,4]nonane-8-carboxylic acid HBr, 6,9-dithia-3-azaspiro[4.4]nonane-2-carboxylic acid hydrobromide

Molecular Formula:	C₇H₁₂BrNO₂S₂	Molecular Weight:	286.209680 [g/mol]
H-Bond Donor:	2	H-Bond Acceptor:	5

InChIKey: DXALUCGGSBGKIY-UHFFFAOYSA-N

• 4-Methyl-5-thiazolecarboxaldehyde

IUPAC Name: 4-methyl-1,3-thiazole-5-carbaldehyde | CAS Registry Number: 82294-70-0
Synonyms: 4-Methyl-5-formylthiazole, 5-Formyl-4-methylthiazole, 633208_ALDRICH, 4-Methylthiazole-5-carboxaldehyde, 4-Methyl-1,3-thiazole-5-carbaldehyde, ALBB-006041, TL8005444, InChI=1/C5H5NOS/c1-4-5(2-7)8-3-6-4/h2-3H,1H

Molecular Formula:	C₅H₅NOS	Molecular Weight:	127.164300 [g/mol]
H-Bond Donor:	0	H-Bond Acceptor:	2

InChIKey: JJVIEMFQPALZOZ-UHFFFAOYSA-N

• 2,5-Diformylfuran

IUPAC Name: furan-2,5-dicarbaldehyde | CAS Registry Number: 823-82-5
Synonyms: 2,5-Furandicarbaldehyde, Furan-2,5-dial, 2,5-Furandicarboxaldehyde, Furan-2,5-dicarbaldehyde, NSC618088, CID69980, EINECS 212-520-7, TL80073462

Molecular Formula:	C₆H₄O₃	Molecular Weight:	124.094160 [g/mol]
H-Bond Donor:	0	H-Bond Acceptor:	3

InChIKey: PXJJKVNIMAZHCB-UHFFFAOYSA-N

• 4,5-Difluorophthalicacid

IUPAC Name: 4,5-difluorophthalic acid | CAS Registry Number: 18959-31-4
Synonyms: 4,5-difluorophthalic acid, 4,5-Difluorobenzene-1,2-dicarboxylic acid, SBB064350, AG-E-38425, 1,2-benzenedicarboxylic acid, 4,5-difluoro-, PubChem1946, AC1LD73S, SureCN4830274, KSC174S8B, AKOS AKM00016, AC1Q722I, AKOS 268, CTK0H4980, MolPort-000-882-220, WT071, ACT03032, ANW-47528, AKOS000278395, AS02022, Phthalicacid, 4,5-difluoro- (8CI);

Molecular Formula:	C₈H₄F₂O₄	Molecular Weight:	202.111766 [g/mol]
H-Bond Donor:	2	H-Bond Acceptor:	6

InChIKey: FFSBOABNRUJQFW-UHFFFAOYSA-N

• 7,8-Dimethoxy-1,3,4,5-Tetrahydrobenzo[d]azepin-2-One

IUPAC Name: 7,8-dimethoxy-1,2,3,5-tetrahydro-3-benzazepin-4-one | CAS Registry Number: 20925-64-8
Synonyms: 7,8-DIMETHOXY-1,3,4,5-TETRAHYDROBENZO[D]AZEPIN-2-ONE, AG-E-53636, 7,8-Dimethoxy-1,3,4,5-tetrahydro-2H-benzazepin-2-one, 1,3,4,5-Tetrahydro-7,8-dimethoxy-2H-3-benzazepin-2-one, 7,8-dimethoxy-1,3,4,5-tetrahydro-2H-3-benzazepin-2-one, 2H-3-BENZAZEPIN-2-ONE, 1,3,4,5-TETRAHYDRO-7,8-DIMETHOXY-, PubChem21052, SureCN24795, AGN-PC-008DPO, Oprea1_332723, CTK1A1991, MolPort-003-804-990, AC1Q4712, ANW-44761, ZINC05720277, AKOS015951199, AC-4649, MCULE-2667343881, AK-40393, KB-46020

Molecular Formula:	C₁₂H₁₅NO₃	Molecular Weight:	221.252400 [g/mol]
H-Bond Donor:	1	H-Bond Acceptor:	3

InChIKey: RXKTVGMZJMDNLF-UHFFFAOYSA-N

• 4-Amino-6-Bromoquinoline

IUPAC Name: 6-bromoquinolin-4-amine | CAS Registry Number: 65340-73-0
Synonyms: 6-bromoquinolin-4-amine, 4-Amino-6-bromoquinoline, ZINC02513557, QU491, CID2756374, TL8007312, UX00006143

Molecular Formula:	C₉H₇BrN₂	Molecular Weight:	223.069280 [g/mol]
H-Bond Donor:	1	H-Bond Acceptor:	2

InChIKey: FNXZGQRYAJYZLP-UHFFFAOYSA-N

• 2-Hydroxynicotinaldehyde

IUPAC Name: 2-oxo-1H-pyridine-3-carbaldehyde | CAS Registry Number: 36404-89-4
Synonyms: 2-hydroxynicotinaldehyde, ZINC03883730, CID7062196, TL80073454, 2Z-0720

Molecular Formula:	C₆H₅NO₂	Molecular Weight:	123.109400 [g/mol]
H-Bond Donor:	1	H-Bond Acceptor:	2

InChIKey: DNTYEVWEOFZXFE-UHFFFAOYSA-N

• 1,2-Pyrrolidinedicarboxylic Acid, 4,4-Dimethyl-, 1-(1,1-Dimethylethyl) 2-Methyl Ester, (2s)-

IUPAC Name: 1-O-tert-butyl 2-O-methyl (2S)-4,4-dimethylpyrrolidine-1,2-dicarboxylate | CAS Registry Number: 138423-86-6
Synonyms: (S)-1-tert-butyl 2-methyl 4,4-dimethylpyrrolidine-1,2-dicarboxylate, 1,2-Pyrrolidinedicarboxylic acid, 4,4-dimethyl-, 1-(1,1-dimethylethyl) 2-methyl ester, (2S)-, SCHEMBL883144, PYR166, CTK8C4911, MolPort-027-834-915, ANW-73483, AKOS016007835, AK-58876, AJ-117822, TC-162228, AM20080557, Z-7122, (S)-1-Boc-4,4-dimethyl-pyrrolidine-2-carboxylic acid methyl ester, 1-(tert-butyl) 2-methyl (S)-4,4-dimethylpyrrolidine-1,2-dicarboxylate, 1,2-Pyrrolidinedicarboxylicacid, 4,4-dimethyl-, 1-(1,1-dimethylethyl) 2-methyl ester, (2S)-

Molecular Formula:	C₁₃H₂₃NO₄	Molecular Weight:	257.326020 [g/mol]
H-Bond Donor:	0	H-Bond Acceptor:	4

InChIKey: YSKUQLCATBOEBJ-VIFPVBQESA-N

• 5-Ethylindole

IUPAC Name: 5-ethyl-1H-indole | CAS Registry Number: 68742-28-9
Synonyms: 5-ethylindole, 5-ethyl-1H-indole, 1H-Indole, 5-ethyl-, AG-G-65633, 5-Ethylindole;, 5-Ethyl Indole, PubChem22662, SureCN763201, Ambap68742-28-9, CTK2F2667, ANW-56550, ZINC02508158, AKOS006283207, LS20080, AK-30131, KB-43123, TL8007350, AM20080933, FT-0620380, E-7870

Molecular Formula:	C₁₀H₁₁N	Molecular Weight:	145.201040 [g/mol]
H-Bond Donor:	1	H-Bond Acceptor:	0

InChIKey: OLOBSRWDALLNKY-UHFFFAOYSA-N

• 3-Bromo-5-fluorophenol

IUPAC Name: 3-bromo-5-fluorophenol | CAS Registry Number: 433939-27-6
Synonyms: 3-Fluoro-5-Bromophenol, 5-Bromo-3-fluorophenol, AG-F-53628, PubChem4129, ACMC-1APWB, SureCN393819, KSC493M6T, CTK3J3669, MolPort-001-773-363, ACN-S003489, ACT11630, ANW-29982, CL8478, SBB091220, ZINC12957254, AKOS005254559, AC-3758, AS01363, RP25036, TF10006

Molecular Formula:	C₆H₄BrFO	Molecular Weight:	190.997763 [g/mol]
H-Bond Donor:	1	H-Bond Acceptor:	2

InChIKey: JCPJGUPQZDEZQH-UHFFFAOYSA-N

• 3,4-Dibromo-1H-pyrrole-2,5-dione

IUPAC Name: 3,4-dibromopyrrole-2,5-dione | CAS Registry Number: 1122-10-7
Synonyms: Dibromomaleinimide, 2,3-Dibromomaleimide, MALEIMIDE, DIBROMO-, 553603_ALDRICH, 3,4-Dibromo-pyrrole-2,5-dione, BRN 0121508, LS-88678, 5-21-10-00050 (Beilstein Handbook Reference)

Molecular Formula:	C₄HBr₂NO₂	Molecular Weight:	254.864240 [g/mol]
H-Bond Donor:	1	H-Bond Acceptor:	2

InChIKey: BIKSKRPHKQWJCW-UHFFFAOYSA-N

• 3,4-Dibromo-1-methyl-1H-pyrrole-2,5-dione

IUPAC Name: 3,4-dibromo-1-methylpyrrole-2,5-dione | CAS Registry Number: 3005-27-4
Synonyms: N-Methyl-dibromomaleinimide, N-Methyl-2,3-dibromomaleimide, MALEIMIDE, DIBROMO-N-METHYL-, Maleimide, 2,3-dibromo-N-methyl-, 2,3-Dibromo-N-methylmaleimide, 595934_ALDRICH, NSC 120444, BRN 0129149, NSC120444, LS-88679, Maleimide, 2,3-dibromo-N-methyl- (8CI), 1H-Pyrrole-2,5-dione, 3,4-dibromo-1-methyl-, 5-21-10-00050 (Beilstein Handbook Reference), 1H-Pyrrole-2,5-dione, 3,4-dibromo-1-methyl- (9CI)

Molecular Formula:	C₅H₃Br₂NO₂	Molecular Weight:	268.890820 [g/mol]
H-Bond Donor:	0	H-Bond Acceptor:	2

InChIKey: CKITYUQKOJMMOI-UHFFFAOYSA-N

• 5H-Pyrrolo[2,3-b]pyrazine,2-bromo-

IUPAC Name: 2-bromo-5H-pyrrolo[2,3-b]pyrazine | CAS Registry Number: 875781-43-4
Synonyms: 2-bromo-5H-pyrrolo[2,3-b]pyrazine, 5-BROMO-4,7-DIAZAINDOLE, 2-bromo-5H-pyrrolo[3,2-b]pyrazine, PubChem16377, PubChem20664, CTK3E8037, MolPort-000-140-478, ANW-51807, SC1651, ZINC21303791, AKOS006326434, AG-A-38284, AG-H-53478, RP08697, 2-bromanyl-5H-pyrrolo[2,3-b]pyrazine, AK-23813, BR-23813, EN000614, KB-21461, QC-10946

Molecular Formula:	C₆H₄BrN₃	Molecular Weight:	198.020060 [g/mol]
H-Bond Donor:	1	H-Bond Acceptor:	2

InChIKey: KTKMLXBEBKGQGL-UHFFFAOYSA-N

• 2-Chloro-3-methoxyaniline

IUPAC Name: 2-chloro-3-methoxyaniline | CAS Registry Number: 113206-03-4
Synonyms: 2-chloro-3-methoxybenzenamine, 2-CHLORO-3-METHOXY-BENZENAMINE, 2-chloro-3-methoxyphenylamine, 2-CHLORO-3-AMINOANISOLE, Benzenamine,2-chloro-3-methoxy-, Benzenamine, 2-chloro-3-methoxy-, AG-D-32871, AN-584/40152017, Benzenamine, 2-chloro-3-methoxy-, hydrochloride, zlchem 97, PubChem19250, ACMC-1BQ7X, SureCN998927, Jsp001029, 3-AMINO-2-CHLOROANISOLE, CTK4A8142, ZLB0086, 3-AMINO-2-CHLORO-ANISOLE, MolPort-003-179-213, (2-Chloro-3-methoxyphenyl)amine;

Molecular Formula:	C₇H₈ClNO	Molecular Weight:	157.597520 [g/mol]
H-Bond Donor:	1	H-Bond Acceptor:	2

InChIKey: ZWPVZYDSURGWSY-UHFFFAOYSA-N

• 3-Methoxy-2-methylphenylamine

IUPAC Name: 3-methoxy-2-methylaniline | CAS Registry Number: 19500-02-8
Synonyms: 3-Methoxy-2-methylaniline, 1-Amino-3-methoxy-2-methylbenzene, 3-Methoxy-2-methyl-phenylamine, 3-Methoxy-2-methyl-Benzenamine, Benzenamine, 3-methoxy-2-methyl-, 2-methyl-3-Methoxyaniline, 3-methoxy-2-methylbenzenamine, AG-E-42544, 3-methoxy-2-methyl-aniline, zlchem 580, 3-Methoxy-o-toluidine, PubChem15040, ACMC-209eyx, AGN-PC-00GIOM, SureCN265737, KSC174K5F, BEN345, 2-METHYL-3-AMINOANISOLE, 3-AMINO-2-METHYLANISOLE, CTK0H4552

Molecular Formula:	C₈H₁₁NO	Molecular Weight:	137.179040 [g/mol]
H-Bond Donor:	1	H-Bond Acceptor:	2

InChIKey: OPXLVWLFDKRYRB-UHFFFAOYSA-N

• 5-Amino-4-cyano-1-methyl-1,2-pyrazole

IUPAC Name: 5-amino-1-methylpyrazole-4-carbonitrile | CAS Registry Number: 5334-41-8
Synonyms: NCIOpen2_001676, NSC1412, ZERO/006199, 5-Amino-4-cyano-1-methylpyrazole, CID219740, NSC102022, ZINC00169364, 5-amino-1-methyl-1H-pyrazole-4-carbonitrile, TL8003508, 1H-pyrazole-4-carbonitrile, 5-amino-1-methyl-, 5-AMINO-1-METHYLPYRAZOLE-4-CARBONITRILE, AG-826/25038003, InChI=1/C5H6N4/c1-9-5(7)4(2-6)3-8-9/h3H,7H2,1H

Molecular Formula:	C₅H₆N₄	Molecular Weight:	122.127940 [g/mol]
H-Bond Donor:	1	H-Bond Acceptor:	4

InChIKey: MZFBWODPTSTYAI-UHFFFAOYSA-N

• 7-Bromoquinoline

IUPAC Name: 7-bromoquinoline | CAS Registry Number: 4965-36-0
Synonyms: 7-bromoquinoline, Quinoline, 7-bromo-, MLS000543458, ZINC01020114, SMR000162690, TL8007311, InChI=1/C9H6BrN/c10-8-4-3-7-2-1-5-11-9(7)6-8/h1-6

Molecular Formula:	C₉H₆BrN	Molecular Weight:	208.054640 [g/mol]
H-Bond Donor:	0	H-Bond Acceptor:	1

InChIKey: XYBSZCUHOLWQQU-UHFFFAOYSA-N

• 2-[(S)-(4-Chlorophenyl)(4-Piperidinyloxy)methyl]Pyridine

IUPAC Name: 2-[(S)-(4-chlorophenyl)-piperidin-4-yloxymethyl]pyridine | CAS Registry Number: 201594-84-5
Synonyms: (S)-2-[(4-Chlorophenyl)(4-piperidinyloxy)methyl]pyridine, (S)-2-((4-Chlorophenyl)(piperidin-4-yloxy)methyl)pyridine, (s)-4-[1-(4-chlorophenyl)-1-(2-pyridyl)methoxy]piperidine, PubChem19183, SureCN2805296, CTK0J9591, MolPort-005-943-346, ANW-57460, AKOS015901675, AC-6931, AK-86958, KB-80200, I14-13990, Pyridine,2-[(S)-(4-chlorophenyl)(4-piperidinyloxy)methyl]-

Molecular Formula:	C₁₇H₁₉ClN₂O	Molecular Weight:	302.798560 [g/mol]
H-Bond Donor:	1	H-Bond Acceptor:	3

InChIKey: OTZYADIPHOGUDN-KRWDZBQOSA-N

• (2-Methyl-1H-Benzimidazol-1-Yl)acetic Acid 0.5 Hydrate

IUPAC Name: 2-(2-methylbenzimidazol-1-yl)acetic acid | CAS Registry Number: 40332-17-0
Synonyms: Enamine_001840, Oprea1_058908, Oprea1_784008, (2-methyl-1H-benzimidazol-1-yl)acetic acid, ALBB-004716, CID719681, STK019245, BAS 00385246, BBV-000208, 2-Methyl-1H-benzimidazole-1-acetic acid, EC-000.1974, (2-Methyl-benzoimidazol-1-yl)-acetic acid, TL8007284, AF-399/33193016, 2-(2-methyl-1H-benzo[d]imidazol-1-yl)acetic acid

Molecular Formula:	C₁₀H₁₀N₂O₂	Molecular Weight:	190.198600 [g/mol]
H-Bond Donor:	1	H-Bond Acceptor:	3

InChIKey: SMGBDFGKVGSCGB-UHFFFAOYSA-N

• (1R,2S,4S)-Bicyclo[2.2.1]heptan-2-amine

IUPAC Name: (1S,3S,4R)-bicyclo[2.2.1]heptan-3-amine;hydrochloride | CAS Registry Number: 121055-07-0
Synonyms: (1R,2S,4S)-Bicyclo[2.2.1]heptan-2-amine hydrochloride, ANW-70837, AKOS016007824, AK104950, KB-205334

Molecular Formula:	C₇H₁₄ClN	Molecular Weight:	147.645760 [g/mol]
H-Bond Donor:	2	H-Bond Acceptor:	1

InChIKey: IZZMPZQAQTXAHW-UHRUZOLSSA-N

• (Z)-2-Amino-alpha-propylidene-4-thiazoleacetic acid methyl ester hydrochloride

IUPAC Name: methyl (Z)-2-(2-amino-1,3-thiazol-4-yl)pent-2-enoate;hydrochloride | CAS Registry Number: 140128-28-5
Synonyms: (Z)-Methyl 2-(2-aminothiazol-4-yl)pent-2-enoate hydrochloride, AKOS016005092, RP17585, AK103044, KB-212137

Molecular Formula:	C₉H₁₃ClN₂O₂S	Molecular Weight:	248.729720 [g/mol]
H-Bond Donor:	2	H-Bond Acceptor:	5

InChIKey: ACOBUWCQVBVTGT-YHSAGPEESA-N

• 5-Bromo-1,3-difluoro-2-nitrobenzene

IUPAC Name: 5-bromo-1,3-difluoro-2-nitrobenzene | CAS Registry Number: 147808-42-2
Synonyms: 1-Bromo-3,5-difluoro-4-nitrobenzene, AG-D-93125, Benzene,5-bromo-1,3-difluoro-2-nitro-, SureCN1358844, ACMC-20a011, CTK4C5585, 4-Bromo-2,6-difluoronitrobenzene, MolPort-009-198-809, ANW-50963, WT1594, WTI-10153, AKOS015834392, AS00299, QC-4589, RP05769, 5-Bromo-1,3-difluoro-2-nitrobenzene;, AK-33347, BL006044, BR-33347, KB-41781

Molecular Formula:	C₆H₂BrF₂NO₂	Molecular Weight:	237.986386 [g/mol]
H-Bond Donor:	0	H-Bond Acceptor:	4

InChIKey: ABAGKHWCTWMUDH-UHFFFAOYSA-N

• (R)-Tetrahydro-2-furancarbothioic acid

IUPAC Name: oxolane-2-carbothioic S-acid | CAS Registry Number: 153165-72-1
Synonyms: 2-Furancarbothioicacid, tetrahydro-, (2R)-, ACMC-20n6mc

Molecular Formula:	C₅H₈O₂S	Molecular Weight:	132.180820 [g/mol]
H-Bond Donor:	1	H-Bond Acceptor:	3

InChIKey: VXYYXBQTPJTYOB-UHFFFAOYSA-N