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187437

Sigma-Aldrich

Bis(trimethylsilyl)acetylene

99%

Sinonimo/i:

BTMSA

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About This Item

Formula condensata:
(CH3)3SiC≡CSi(CH3)3
Numero CAS:
14630-40-1
Peso molecolare:
170.40
Beilstein:
906870
Numero CE:
238-671-9
Numero MDL:
MFCD00008276
Codice UNSPSC:
12352100
ID PubChem:
24851275
NACRES:
NA.22

Saggio

99%

Indice di rifrazione

n20/D 1.427 (lit.)

P. eboll.

136-137 °C (lit.)

Punto di fusione

21-24 °C (lit.)

Densità

0.752 g/mL at 25 °C (lit.)

Temperatura di conservazione

2-8°C

Stringa SMILE

C[Si](C)(C)C#C[Si](C)(C)C

InChI

1S/C8H18Si2/c1-9(2,3)7-8-10(4,5)6/h1-6H3
ZDWYFWIBTZJGOR-UHFFFAOYSA-N

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Descrizione generale

Bis(trimethylsilyl)acetylene (BTMSA) participates as nucleophile in Friedel-Crafts type acylations and alkylations. BTMSA undergoes rhodium catalyzed addition reaction with diarylacetylenes. It undergoes cycloaddition with 1,5-hexadiynes in the presence of CpCo(CO)2 (Cp=cyclopentadienyl) to form benzocyclobutenes. Structure of BTMSA was characterized by a centre of inversion present on triple bond (length=1.208(3)Å). TiCl4-Et2AlCl catalyzed Diels-Alder reaction of BTMSA with norbornadiene has been reported.

Applicazioni

Bis(trimethylsilyl)acetylene (BTMSA) was used as starting reagent in the synthesis of functionalized 4-R-1,2-bis(trimethylsilyl)benzenes. It was also used in the synthesis of (+)-brasilenyne and (β-diketanato)Ag(BTMSA).

Pittogrammi

FlameExclamation mark
GHS02,GHS07

Avvertenze

Danger

Indicazioni di pericolo

H225,H315,H319,H335

Classi di pericolo

Eye Irrit. 2 - Flam. Liq. 2 - Skin Irrit. 2 - STOT SE 3

Organi bersaglio

Respiratory system

Codice della classe di stoccaggio

3 - Flammable liquids

Classe di pericolosità dell'acqua (WGK)

WGK 3

Punto d’infiammabilità (°F)

35.6 °F - closed cup

Punto d’infiammabilità (°C)

2 °C - closed cup

Dispositivi di protezione individuale

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

Certificati d'analisi (COA)

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Bis (trimethylsilyl) acetylene.
Bruckmann J and Kruger C.
Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials, 53(12), 1845-1846 (1997)
Titanium-catalyzed cycloaddition-cycloreversion cascade in the reaction of norbornadiene with bis (trimethylsilyl) acetylene.
Mach K, et al.
Organometallics, 5(6), 1215-1219 (1986)
Scott E Denmark et al.
Journal of the American Chemical Society, 124(51), 15196-15197 (2002-12-19)
The first, total synthesis of (+)-brasilenyne (1) has been achieved in 19 steps from l-(S)-malic acid. The key elements of this approach are a highly diastereoselective ring-opening of a 1,3-dioxolanone with bis(trimethylsilyl)acetylene) promoted by TiCl4 to set a propargylic stereocenter
Akinobu Horita et al.
Organic letters, 10(9), 1751-1754 (2008-04-10)
The addition of bis(trimethylsilyl)acetylene to diarylacetylenes proceeds efficiently and selectively in a formal anti fashion in the presence of [Rh(OH)(cod)]2/bisphosphine and phenol as catalyst and activator, respectively, accompanied by cleavage of one of the C-Si bonds to produce the corresponding
Tetrahedron Letters, 35, 417-417 (1994)
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Articoli

Diels–Alder Reaction

The Diels–Alder reaction is the reaction between a conjugated diene and an alkene (dienophile) to form unsaturated six-membered rings. It is also referred to as a cycloaddition.

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