ChemicalBook > CAS DataBase List > 2-CYCLOPENTENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE

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
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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
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Safety

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

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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
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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

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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