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Sigma-Aldrich

Phenylboronic acid pinacol ester

97%

Synonym(s):

(Pinacolboryl)benzene, 4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane, Pinacol phenylboronate, cyclic tetramethylethylene ester benzeneboronic acid

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About This Item

Empirical Formula (Hill Notation):
C12H17BO2
CAS Number:
24388-23-6
Molecular Weight:
204.07
MDL number:
MFCD00966985
UNSPSC Code:
12352103
PubChem Substance ID:
24883506
NACRES:
NA.22
Pricing and availability is not currently available.

Quality Level

100

Assay

97%

form

solid

mp

27-31 °C (lit.)

SMILES string

CC1(C)OB(OC1(C)C)c2ccccc2

InChI

1S/C12H17BO2/c1-11(2)12(3,4)15-13(14-11)10-8-6-5-7-9-10/h5-9H,1-4H3

InChI key

KKLCYBZPQDOFQK-UHFFFAOYSA-N

General description

Phenylboronic acid, pinacol ester, also known as boronate ester, is generally used in metal-catalyzed C-C bond formation reactions like Suzuki–Miyaura reaction.[1]

Application

Phenylboronic acid pinacol ester can be used:
  • To prepare sulfinamide derivatives by reacting with diethylaminosulfur trifluoride (DAST) and potassium phenyltrifluoroborate.[2]
  • As a substrate in the study of Suzuki–Miyaura coupling of various aryl iodides over SiliaCat Pd(0).[3]

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H302,H315,H319,H335

Hazard Classifications

Acute Tox. 4 Oral - Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

224.6 °F - closed cup

Flash Point(C)

107 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MKCR6518
MKCS4032
MKCQ4351
MKCP9399
MKCL2336

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Heterogeneous Pd/C-catalyzed ligand-free Suzuki-Miyaura coupling reaction using aryl boronic esters
Kitamura Y, et al.
Tetrahedron, 63(43), 10596-10602 (2007)
Metal-Free Cross-Coupling of Arylboronic Acids and Derivatives with DAST-Type Reagents for Direct Access to Diverse Aromatic Sulfinamides and Sulfonamides
Wang Q, et al.
Angewandte Chemie (International Edition in English), 55(36), 10811-10815 (2016)
Enhanced heterogeneously catalyzed Suzuki-Miyaura reaction over SiliaCat Pd (0)
Pandarus V, et al.
Tetrahedron Letters, 54(35), 4712-4716 (2013)

Questions

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  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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