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ChemicalBook--->CAS DataBase List--->16116-78-2

16116-78-2

16116-78-2 Structure

16116-78-2 Structure
IdentificationBack Directory
[Name]

(4-BROMOPHENYLETHYNYL)TRIMETHYLSILANE
[CAS]

16116-78-2
[Synonyms]

(4-BROMOPHENYLETHYNYL)TRIMETHYLSILANE
(4-Bromophenyl)Trimethylsilylacetylene
(2-(4-bromophenyl)ethynyl)trimethylsilane
(4-BroMophenylethynyl)triMethylsilane 98%
(4-BROMOPHENYLETHYNYL)TRIMETHYLSILANE, 9 8%
1-Bromo-4-[2-(trimethylsilyl)ethynyl]benzene
Benzene, 1-bromo-4-[2-(trimethylsilyl)ethynyl]-
(4-Bromophenylethynyl) trimethylsilane, 98% white to yellow powder
[Molecular Formula]

C11H13BrSi
[MDL Number]

MFCD01863556
[MOL File]

16116-78-2.mol
[Molecular Weight]

253.21
Chemical PropertiesBack Directory
[Melting point ]

61-63 °C(lit.)
[Boiling point ]

60-80°C/0.2mmHg
[density ]

1,192 g/cm3
[storage temp. ]

Sealed in dry,2-8°C
[form ]

Powder
[color ]

White to yellow
[Specific Gravity]

1.192
[Hydrolytic Sensitivity]

1: no significant reaction with aqueous systems
[InChI]

InChI=1S/C11H13BrSi/c1-13(2,3)9-8-10-4-6-11(12)7-5-10/h4-7H,1-3H3
[InChIKey]

RNMSGCJGNJYDNS-UHFFFAOYSA-N
[SMILES]

C1(Br)=CC=C(C#C[Si](C)(C)C)C=C1
Safety DataBack Directory
[Risk Statements ]

36/37/38
[Safety Statements ]

26-36/37/39
[WGK Germany ]

3
[TSCA ]

No
[HS Code ]

2931.90.6000
Hazard InformationBack Directory
[Uses]

(4-Bromophenylethynyl)trimethylsilane may be used to synthesize:
  • 1-bromo-4-ethynylbenzene
  • 4-(4-bromophenyl)-3-butyn-2-one
  • 4-ethynyl-4′-tert-butylbiphenyl
  • 1,4-bis[2-(4-bromophenyl)ethynyl]-2,5-dihexylbenzene
[General Description]

(4-Bromophenylethynyl)trimethylsilane can be synthesized by the palladium catalyzed reaction between 4-bromo-1-iodobenzene and trimethylsilylacetylene. It undergoes Buchwald-Hartwig coupling with para-substituted diphenylamines.
[Synthesis]

1-Bromo-4-iodobenzene

589-87-7

Trimethylsilylacetylene

1066-54-2

(4-BROMOPHENYLETHYNYL)TRIMETHYLSILANE

16116-78-2

In a two-necked round-bottomed flask (RBF) equipped with a magnetic stirrer, triethylamine (TEA, 200 mL) was added and 1-bromo-4-iodobenzene (24.00 g, 84.83 mmol) was added at room temperature and protected by nitrogen. After stirring the mixture for 5 min, ethynyltrimethylsilane (13.19 mL, 93.31 mmol), dichlorobis(triphenylphosphine)palladium(II) (Pd(PPh3)2Cl2, 2.98 g, 4.24 mmol), and cuprous iodide (CuI, 1.62 g, 8.48 mmol) were added sequentially. The reaction mixture was continued to be stirred at the same temperature for 30 min. Subsequently, the excess TEA was removed by vacuum evaporation and the pH was adjusted to 1 by adding 1 N hydrochloric acid. extraction was carried out with ethyl acetate (EtOAc) and water, and the organic layer was washed with brine and dried over anhydrous magnesium sulfate (MgSO4). After evaporation of the solvent, the residue was purified by column chromatography (eluent: hexane) to afford the target compound (4-bromophenyl ethynyl)trimethylsilane (21.00 g, 98% yield) as a white solid.1H NMR (CDCl3, 500 MHz): δ 7.19-7.06 (4H, m, ArH), 0.00 (9H, s, Si(CH3)3); 13C NMR (CDCl3, 125 MHz): δ 133.5, 131.6, 122.8, 122.3, 104.0, 95.7, 0.00.

[References]

[1] Journal of Organic Chemistry, 2015, vol. 80, # 8, p. 4097 - 4107
[2] Dalton Transactions, 2013, vol. 42, # 2, p. 338 - 341
[3] Organometallics, 2014, vol. 33, # 18, p. 4947 - 4963
[4] Synlett, 1999, # 6, p. 750 - 752
[5] Tetrahedron Letters, 2005, vol. 46, # 1, p. 27 - 30
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