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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

2-Cyclopentenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane Structure
2-Cyclopentenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane structure
CAS No.
287944-10-9
Chemical Name:
2-Cyclopentenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
Synonyms
1-Cyclopentenylboronic acid pinacol este;1-Cyclopenteneboronic Acid Pinacol Ester;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;1-Cyclopentenyl-4,4,5,5-TetraMethyl-1,3,2-Dioxaborolane;2-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
Molecular Weight:
194.08
MDL Number:
MFCD08669391
MOL File:
287944-10-9.mol
MSDS File:
SDS
TDS File:
TDS
Last updated:2026-09-12 18:48:31
Request For Quotation

2-Cyclopentenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane Properties

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

SAFETY

Risk and Safety Statements

Symbol(GHS)  Exclamation Mark (GHS07)
GHS07
Signal word  Warning
Hazard statements  H315-H319-H335
Precautionary statements  P280G-P305+P351+P338
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-37
TSCA  No
HS Code  2931900090
NFPA 704
2
0 0

2-Cyclopentenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane price More Price(54)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
TCI Chemical C3385 2-(1-Cyclopentenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane >98.0%(GC) 287944-10-9 1g $38 2026-04-30 Buy
TCI Chemical C3385 2-(1-Cyclopentenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane >98.0%(GC) 287944-10-9 5g $129 2026-04-30 Buy
Usbiological 268929 1-Cyclopentenylboronic acid pinacol ester 287944-10-9 250mg $333 2026-06-03 Buy
Usbiological 268929 1-Cyclopentenylboronic acid pinacol ester 287944-10-9 500mg $439 2026-06-03 Buy
Usbiological 268929 1-Cyclopentenylboronic acid pinacol ester 287944-10-9 1g $588 2026-06-03 Buy
Product number Packaging Price Buy
C3385 1g $38 Buy
C3385 5g $129 Buy
268929 250mg $333 Buy
268929 500mg $439 Buy
268929 1g $588 Buy

2-Cyclopentenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane Chemical Properties,Uses,Production

Synthesis

1-Chloro-1-cyclopentene

930-29-0

Bis(pinacolato)diboron

73183-34-3

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

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

Triisopropyl borate 1-Chloro-1-cyclopentene Bis(pinacolato)diboron Cyclopentanone p-Toluenesulfonylhydrazone Potassium Acetate
1,4-Dioxane

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Preparation Products

2-Cyclopentenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane Suppliers

Global( 152)Suppliers
Supplier Tel Email Country ProdList Advantage
Hangzhou Copiore Chemical Co., Ltd. 17300981287 13757145729 sales@copiore.com China 289 58
J & K SCIENTIFIC LTD. 18210857532 18210857532 jkinfo@jkchemical.com China 96815 76
TCI (Shanghai) Development Co., Ltd. 021-67121386 Sales-CN@TCIchemicals.com China 24512 81
Energy Chemical 400-0056266 sales8178@energy-chemical.com China 44850 61
Accela ChemBio Co.,Ltd. 021-50795510 4000665055 marketing@accelachem.com China 10972 64
Nanjing Chemlin Chemical Co., Ltd 025-83697070 13770331960 info@chemlin.com.cn China 16305 64
Shanghai Hanhong Scientific Co.,Ltd. 021-54306202 13764082696 info@hanhongsci.com China 42917 64
Shanghai ZaiQi Bio-Tech Co., Ltd. 021-54824098, 021-37212705 021-37212706, 13391256916 sales@chemzq.com China 569 55
Dalian GoldenGate Biotech Co., Ltd. 137328113 15524772882 dlgoldengate@163.com China 53 50
Shanghai Topbiochem Technology Co., Ltd 021-58170097 info@topbiochem.com China 9513 58
Supplier Advantage
Hangzhou Copiore Chemical Co., Ltd. 58
J & K SCIENTIFIC LTD. 76
TCI (Shanghai) Development Co., Ltd. 81
Energy Chemical 61
Accela ChemBio Co.,Ltd. 64
Nanjing Chemlin Chemical Co., Ltd 64
Shanghai Hanhong Scientific Co.,Ltd. 64
Shanghai ZaiQi Bio-Tech Co., Ltd. 55
Dalian GoldenGate Biotech Co., Ltd. 50
Shanghai Topbiochem Technology Co., Ltd 58

View Lastest Price from 2-Cyclopentenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
1-Cyclopentenylboronic acid pinacol ester pictures 2026-08-25 1-Cyclopentenylboronic acid pinacol ester
287944-10-9
 $3.00-9.00 99% ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD
2-CYCLOPENTENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE pictures 2019-07-06 2-CYCLOPENTENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE
287944-10-9
 $1.00 1KG 98%-100% 1 Career Henan Chemical Co

2-Cyclopentenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane Spectrum

2-CYCLOPENTENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE(287944-10-9)1HNMR2-CYCLOPENTENYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE(287944-10-9)1HNMR

287944-10-9(2-Cyclopentenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane)Related Search:

Isopropenylboronic acid pinacol ester BUTYLDIISOPROPOXYBORANE 2-BUTYL-4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE Cyclopenten-1-ylboronic acid 2-Cyclopentenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
2-(5,5-dimethylcyclopent-1-enyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane

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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] 2-Cyclopentenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 287944-10-9 C11H19BO2 Organoborons