2-CYCLOPENTENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE

Product Name: 2-CYCLOPENTENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE
CAS No.: 287944-10-9
Chemical Name: 2-CYCLOPENTENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE
Synonyms: 1-Cyclopenteneboronic Acid Pinacol Ester;1-Cyclopentenylboronic acid pinacol este;Cyclopenten-1-ylboronic acid picol ester;1-Cyclopentenyl boronic acid pinacol ester;Cyclopentene-1-boronic acid, pinacol ester;Cyclopenten-1-ylboronic acid, pinacol ester;1-Cyclopentenyl-1-yl-boronic acid pinacol ester;2-CYCLOPENTENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE;1-Cyclopentenyl-4,4,5,5-TetraMethyl-1,3,2-Dioxaborolane;2-(1-Cyclopentenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
CBNumber: CB0844406
Molecular Formula: C11H19BO2
Formula Weight: 194.08
MOL File: 287944-10-9.mol

More

Less

2-CYCLOPENTENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE Property

Boiling point:: 210.0±33.0 °C(Predicted)
Density: 0.96±0.1 g/cm3(Predicted)
refractive index: 1.46
storage temp.: Keep in dark place,Sealed in dry,Room Temperature
form: liquid
color: colorless or yellow
InChI: InChI=1S/C11H19BO2/c1-10(2)11(3,4)14-12(13-10)9-7-5-6-8-9/h7H,5-6,8H2,1-4H3
InChIKey: JFTZVYKESKQING-UHFFFAOYSA-N
SMILES: O1C(C)(C)C(C)(C)OB1C1CCCC=1

More

Less

Safety

Hazard Codes: Xi
Risk Statements: 36/37/38
Safety Statements: 26-37
TSCA: No
HS Code: 2931900090

More

Less

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

More

Less

N-Bromosuccinimide Price

TCI Chemical

Product number: C3385
Product name: 2-(1-Cyclopentenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
Purity: >98.0%(GC)
Packaging: 1g
Price: $45
Updated: 2025/07/31

TCI Chemical

Product number: C3385
Product name: 2-(1-Cyclopentenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
Purity: >98.0%(GC)
Packaging: 5g
Price: $152
Updated: 2025/07/31

TRC

Product number: C991473
Product name: Cyclopenten-1-ylboronicacid,pinacolester
Packaging: 1g
Price: $75
Updated: 2021/12/16

Usbiological

Product number: 268929
Product name: 1-Cyclopentenylboronic acid pinacol ester
Packaging: 250mg
Price: $333
Updated: 2021/12/16

TRC

Product number: C991473
Product name: Cyclopenten-1-ylboronicacid,pinacolester
Packaging: 100mg
Price: $45
Updated: 2021/12/16

More

Less

2-CYCLOPENTENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE Chemical Properties,Usage,Production

Synthesis

930-29-0

73183-34-3

287944-10-9

Example XIV: Synthesis of 2-cyclopent-1-enyl-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane Under argon protection, 4.31 g of 1-chloro-1-cyclopentene and 12.5 g of bis(pinacolato)diboron were dissolved in 160 mL of 1,4-dioxane, 8 g of potassium acetate was added, and argon purged for 5 min. Subsequently, 370 mg of tris(dibenzylideneacetylidene)dipalladium(0) ([Pd2(dba)3]) and 780 mg of 2-cyclohexylphosphino-2',4',6'-triisopropyl-1,1'-biphenyl were added, and the reaction mixture was heated to 80 °C for 3 hours. After completion of the reaction, it was cooled to room temperature, diluted with diethyl ether, the organic phase was washed with water and brine sequentially, and the organic phase was dried with anhydrous magnesium sulfate. The solvent was removed by evaporation under reduced pressure and the residue was ground with petroleum ether. The precipitate was collected by filtration and the mother liquor was evaporated under reduced pressure to obtain the product. Yield: 13.1 g (99% yield). Mass spectrum (EI): m/z = 194 [M]+.

References

[1] Patent: WO2011/101424, 2011, A1. Location in patent: Page/Page column 230-231
[2] Patent: US2012/46304, 2012, A1. Location in patent: Page/Page column 123
[3] Patent: WO2012/110599, 2012, A1. Location in patent: Page/Page column 230-231
[4] Patent: US2013/53404, 2013, A1. Location in patent: Paragraph 1781; 1782; 1783
[5] Journal of Organic Chemistry, 2012, vol. 77, # 7, p. 3543 - 3548

2-CYCLOPENTENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE Preparation Products And Raw materials

Raw materials

Preparation Products

More

Less

2-CYCLOPENTENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE Suppliers

Americas 1 China 121 Europe 1 India 3 Japan 1 United Kingdom 2 United States 18 Global 147

Hangzhou Copiore Chemical Co., Ltd.

Tel: 0571-56501939;0571-56076030 13757145729
Fax: 0571-56501939
Email: sales@copiore.com
Country: China
ProdList: 299
Advantage: 58

J & K SCIENTIFIC LTD.

Tel: 18210857532; 18210857532
Fax: 86-10-82849933
Email: jkinfo@jkchemical.com
Country: China
ProdList: 96815
Advantage: 76

TCI (Shanghai) Development Co., Ltd.

Tel: 021-67121386
Fax: 021-67121385
Email: Sales-CN@TCIchemicals.com
Country: China
ProdList: 24529
Advantage: 81

Energy Chemical

Tel: 021-021-58432009 400-005-6266
Fax: 021-58436166
Email: sales8178@energy-chemical.com
Country: China
ProdList: 44801
Advantage: 61

Accela ChemBio Co.,Ltd.

Tel: 021-50795510 4000665055
Fax: 021-50795055
Email: sales@accelachem.com
Country: China
ProdList: 11035
Advantage: 64

Nanjing Chemlin Chemical Co., Ltd

Tel: 025-83697070
Fax: +86-25-83453306
Email: info@chemlin.com.cn
Country: China
ProdList: 15883
Advantage: 64

Shanghai Hanhong Scientific Co.,Ltd.

Tel: 021-54306202 13764082696
Email: info@hanhongsci.com
Country: China
ProdList: 42934
Advantage: 64

Shanghai ZaiQi Bio-Tech Co., Ltd.

Tel: 021-54824098, 021-37212705 021-37212706, 13391256916
Fax: 021-54824069
Email: sales@chemzq.com
Country: China
ProdList: 570
Advantage: 55

Dalian GoldenGate Biotech Co., Ltd.

Tel: 137328113 15524772882
Fax: 0411-86724203
Email: dlgoldengate@163.com
Country: China
ProdList: 53
Advantage: 50

Shanghai Topbiochem Technology Co., Ltd

Tel: 021-58170097
Email: info@topbiochem.com
Country: China
ProdList: 9510
Advantage: 58

More

Less

View Lastest Price from 2-CYCLOPENTENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE manufacturers

ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD

Product: 1-Cyclopentenylboronic acid pinacol ester 287944-10-9
Price: US $3.00-9.00/KG
Min. Order: 0.1KG
Purity: 99%
Supply Ability: g-kg-tons, free sample is available
Release date: 2025-07-02

Career Henan Chemical Co

Product: 2-CYCLOPENTENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE 287944-10-9
Price: US $1.00/KG
Min. Order: 1KG
Purity: 98%-100%
Supply Ability: 1
Release date: 2018-08-10

287944-10-9, 2-CYCLOPENTENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANERelated Search:

2-CYCLOPENTENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE Isopropenylboronic acid pinacol ester BUTYLDIISOPROPOXYBORANE CYCLOPENTEN-1-YLBORONIC ACID 2-BUTYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE

2-CYCLOPENTENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE

1-Cyclopentenyl boronic acid pinacol ester

2-(Cyclopent-2-enyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane

Cyclopenten-1-ylboronic acid, pinacol ester

1,3,2-Dioxaborolane, 2-(1-cyclopenten-1-yl)-4,4,5,5-tetraMethyl-

2-(1-Cyclopenten-1-yl)-4,4,5,5-tetraMethyl-1,3,2-dioxaborolane

1-Cyclopentenylboronic acid pinacol este

1-Cyclopentenyl-1-yl-boronic acid pinacol ester

2-(cyclopent-1-en-1-yl)-4,4,5,5-tetraMethyl-1,3,2- dioxaborolane

1-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)-1-cyclopentene

1-Cyclopenteneboronic Acid Pinacol Ester

1-Cyclopentenyl-4,4,5,5-TetraMethyl-1,3,2-Dioxaborolane

2-(1-Cyclopentenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane

Cyclopentene-1-boronic acid, pinacol ester

Cyclopenten-1-ylboronic acid picol ester

2-cyclopent-1-enyl-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane

1-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)cyclopentene

2-(Cyclopent-1-en-1-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane - [C22845]

287944-10-9

C11H19BO2

Organoborons