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Cyclopenta[b]pyridine

Cyclopenta[b]pyridine structure

CAS No.: 533-37-9

Chemical Name:: Cyclopenta[b]pyridine

Synonyms: 2,3-Cyclopentenopyridine;Pyrindan;1-pyrindan;7-Azaindane;Cyclopentenopyridine;yclopenta[b]pyridine;2,3-CYCLOPENTAPYRIDINE;3-Cyclopentenopyridine;2,3-CYDOPENTENO PYRIDINE;1H-cyclopenta[b]pyridine

CBNumber:: CB6751229

Molecular Formula:: C8H9N

Molecular Weight:: 119.16

MDL Number:: MFCD00005933

MOL File:: 533-37-9.mol

MSDS File:: SDS

TDS File:: TDS

Last updated:2026-05-28 03:49:25

Product description	Number	Pack Size	Price
2,3-Cyclopentenopyridine 98%	197491	25g	$178
6,7-Dihydro-5H-cyclopenta[b]pyridine >98.0%(GC)(T)	D3536	5g	$33
6,7-Dihydro-5H-cyclopenta[b]pyridine >98.0%(GC)(T)	D3536	25g	$129
2,3-Cyclopentenopyridine 98+% ≥98%(assay)	230791	5g	$156
2,3-Cyclopentenopyridine 98+% ≥98%(assay)	230791	25g	$177
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Cyclopenta[b]pyridine Properties

Melting point	117 °C
Boiling point	87-88 °C/11 mmHg (lit.)
Density	1.018 g/mL at 25 °C (lit.)
refractive index	n20/D 1.544(lit.)
Flash point	153 °F
storage temp.	Sealed in dry,Room Temperature
solubility	Chloroform (Slightly), Methanol (Slightly)
form	clear liquid
pka	6.19±0.20(Predicted)
color	Colorless to Red to Green
InChI	1S/C8H9N/c1-3-7-4-2-6-9-8(7)5-1/h2,4,6H,1,3,5H2
InChIKey	KRNSYSYRLQDHDK-UHFFFAOYSA-N
SMILES	C1Cc2cccnc2C1
CAS DataBase Reference	533-37-9(CAS DataBase Reference)
FDA UNII	18Z19A103W
NIST Chemistry Reference	5H-1-Pyrindine, 6,7-dihydro-(533-37-9)
UNSPSC Code	12352100
NACRES	NA.22

SAFETY

Risk and Safety Statements

Symbol(GHS)

GHS07

Signal word

Warning

Hazard statements

H315-H319-H335

Precautionary statements

P261-P264-P271-P280-P302+P352-P305+P351+P338

target organs

Respiratory system

PPE

Eyeshields, Gloves, type ABEK (EN14387) respirator filter

Hazard Codes

Risk Statements

36/37/38

Safety Statements

26-36

WGK Germany

HS Code

29333990

Storage Class

10 - Combustible liquids

Hazard Classifications

Eye Irrit. 2
Skin Irrit. 2
STOT SE 3

NFPA 704

	2
1		0

Cyclopenta[b]pyridine price More Price(72)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	197491	2,3-Cyclopentenopyridine 98%	533-37-9	25g	$178	2026-04-30	Buy
TCI Chemical	D3536	6,7-Dihydro-5H-cyclopenta[b]pyridine >98.0%(GC)(T)	533-37-9	5g	$33	2026-04-30	Buy
TCI Chemical	D3536	6,7-Dihydro-5H-cyclopenta[b]pyridine >98.0%(GC)(T)	533-37-9	25g	$129	2026-04-30	Buy
Usbiological	230791	2,3-Cyclopentenopyridine 98+% ≥98%(assay)	533-37-9	5g	$156	2026-06-03	Buy
Usbiological	230791	2,3-Cyclopentenopyridine 98+% ≥98%(assay)	533-37-9	25g	$177	2026-06-03	Buy

Product number	Packaging	Price	Buy
197491	25g	$178	Buy
D3536	5g	$33	Buy
D3536	25g	$129	Buy
230791	5g	$156	Buy
230791	25g	$177	Buy

Cyclopenta[b]pyridine Chemical Properties,Uses,Production

Chemical Properties

CLEAR COLORLESS TO BROWNISH LIQUID

Uses

2,3-Cyclopentenopyridine is used as reactant/reagent for ruthenium-mediated dual catalytic reactions of isoquinoline via C-H activation and dearomatization for isoquinolone.

General Description

The structural properties of 2,3-cyclopentenopyridine using spectroscopic and computational techniques have been studied. 2,3-Cyclopentenopyridine is present in the side chain of cefpirome (HR 810), a new cephalosporin.

Synthesis

Synthesized by gas-phase reaction in a fixed-bed reactor at 300C and atmospheric pressure from glycerol, cyclopentanone, and ammonia over a modified alumina catalyst (3%Cu/2%Ti/-AlO). Glycerol conversion is 70.3% with 81.6% selectivity to 2,3-cyclopentenopyridine.

Cyclopenta[b]pyridine Preparation Products And Raw materials

Raw materials

Sodium tetrachloroaurate Ethanol Ethyl acetate Cyclopentanone PROPARGYLAMINE

Preparation Products

5H-CYCLOPENTA[B]PYRIDINE 6,7-DIHYDRO-5H-CYCLOPENTA[B]PYRIDIN-5-OL

Cyclopenta[b]pyridine Suppliers

Global( 452)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
Anhui Zhongda Biotechnology Co., Ltd	+8619956560829	justine@zhongda-biotech.com	China	286	58
Anhuyan (Hainan) Biotechnology Co., LTD	+8618163349544	mollylucking@foxmail.com	China	3000	58
Capot Chemical Co.,Ltd.	+86-（0）57185586718 +86-13336195806	sales@capot.com	China	29640	60
Beijing Cooperate Pharmaceutical Co.,Ltd	010-60279497	sales01@cooperate-pharm.com	CHINA	1803	55
Shanghai Bojing Chemical Co.,Ltd.	+86-86-02137122233 +8613795318958	bj1@bj-chem.com	China	299	55
Henan Tianfu Chemical Co.,Ltd.	+86-0371-55170693 +86-19937530512	info@tianfuchem.com	China	21587	55
ATK CHEMICAL COMPANY LIMITED	+undefined-21-51877795	ivan@atkchemical.com	China	33024	60
career henan chemical co	+86-0371-86658258 +8613203830695	sales@coreychem.com	China	29815	58
Shenzhen Nexconn Pharmatechs Ltd	+86-755-89396905 +86-15013857715	admin@nexconn.com	China	10403	58
Accela ChemBio Inc.	+1-858-6993322	info@accelachem.com	United States	21193	58

Supplier	Advantage
Anhui Zhongda Biotechnology Co., Ltd	58
Anhuyan (Hainan) Biotechnology Co., LTD	58
Capot Chemical Co.,Ltd.	60
Beijing Cooperate Pharmaceutical Co.,Ltd	55
Shanghai Bojing Chemical Co.,Ltd.	55
Henan Tianfu Chemical Co.,Ltd.	55
ATK CHEMICAL COMPANY LIMITED	60
career henan chemical co	58
Shenzhen Nexconn Pharmatechs Ltd	58
Accela ChemBio Inc.	58

View Lastest Price from Cyclopenta[b]pyridine manufacturers

Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
2026-05-22	Cyclopenta[b]pyridine 533-37-9		1G/KG	99%	100000KG	Anhuyan (Hainan) Biotechnology Co., LTD
2025-11-18	Cyclopenta[b]pyridine 533-37-9	$1.10	1g	99.00%	100 Tons Min	Dideu Industries Group Limited
2025-06-20	2,3-Cyclopentenopyridine 533-37-9		1kg	0.99	100tons	Hebei Yanxi Chemical Co., Ltd.

Cyclopenta[b]pyridine
533-37-9
$0.00
99%
Anhuyan (Hainan) Biotechnology Co., LTD

Cyclopenta[b]pyridine
533-37-9
$1.10
99.00%
Dideu Industries Group Limited

2,3-Cyclopentenopyridine
533-37-9
0.99
Hebei Yanxi Chemical Co., Ltd.

Cyclopenta[b]pyridine Spectrum

Cyclopenta[b]pyridine(533-37-9)MS Cyclopenta[b]pyridine(533-37-9)¹HNMR Cyclopenta[b]pyridine(533-37-9)¹³CNMR Cyclopenta[b]pyridine(533-37-9)IR1

533-37-9(Cyclopenta[b]pyridine)Related Search:

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2,3-DIHYDRO-1H-CYCLOPENTA[B]QUINOLIN-9-YLAMINE 6,7-Dihydro-5H-cyclopenta[b]pyridine 3-AMINO-6,7-DIHYDRO-5H-CYCLOPENTA[B]THIENO[3,2-E]PYRIDINE-2-CARBOXYLIC ACID 2,3-DIHYDRO-1H-CYCLOPENTA[B]QUINOLINE-9-CARBOXYLIC ACID ETHYL 3-AMINO-6,7-DIHYDRO-5H-CYCLOPENTA[B]THIENO[3,2-E]PYRIDINE-2-CARBOXYLATE

2,3,5,6,7,8-HEXAHYDRO-1H-CYCLOPENTA[B]QUINOLIN-9-YLAMINE 2,3-Dihydro-7-methyl-1H-cyclopenta[b]quinolin-9-amine Cyclopenta[b]pyridine

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5H-1-Pyrindene, 6,7-dihydro- 5H-1-Pyrindine,6,7-dihydro- 6,7-Dihydro-5H-[1]pyrindine Pyrindan 6,7-DIHYDRO-5H-CYCLOPANTA[B]PYRIDINE 2,3-Cyclopentenoopyridine 2,3-Cyclopentenopyridine ,97% 2,3-Cyclopentenopyridine,99+% 2,3-CYCLOPENOPYRIDINE (CPPY) 2,3-CYCLOPENTAPYRIDINE 2,3-CYDOPENTENO PYRIDINE 2,3-Cyclopentenopyrid(2,3-Trimethylenepyridine) 2,3-CYCLOPENTENOPYRIDINE 99% 2,3-CYCLOPENTANO PYRIDINE 6,7-DIHYDRO-5H-[1]PYRINDINE 6,7-Dihydro-5H-cyclopenta(b)pyridine 2,3-Cyclopentenopyridine 1-pyrindan 7-Azaindane 2,3-Cyclopentenopyridine,6,7-Dihydro-5H-cyclopenta[b]pyridine 3-Cyclopentenopyridine 1H-cyclopenta[b]pyridine Cyclopentenopyridine 5H-Cyclopenta[b]pyridine, 6,7-dihydro- 2,3 cyclopentene and pyridine 6,7-Dihydro-5H-cyclopenta[b]pyridine> 2, 3-cyclopentene pyridine Cyclopenta[b]pyridine ISO 9001：2015 REACH yclopenta[b]pyridine Allopregnenolone acetate 6,7-Dihydro-5H-cyclopenta[b]pyridine 2,3-CYCLOPENTANO PYRIDINEQ: What is 6,7-Dihydro-5H-cyclopenta[b]pyridine 2,3-CYCLOPENTANO PYRIDINE Q: What is the CAS Number of 6,7-Dihydro-5H-cyclopenta[b]pyridine 2,3-CYCLOPENTANO PYRIDINE Q: What is the storage condition of 6,7-Dihydro-5H-cyclopenta[b]pyridine 2,3-CYCLOPENTANO PYRIDINE Q: What are the applications of 6,7-Dihydro-5H-cyclopenta[b]pyridine 2,3-CYCLOPENTANO PYRIDINE Cyclopenta[b]pyridine 533-37-9 Cephalosporin Impurity 12 533-37-9 533-39-7 C8H9N C7 and C8 Building Blocks Pyridines Heterocyclic Building Blocks Heterocycle-Pyridine series pyridine series Pyridines derivates API intermediates 533-37-9