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3140-93-0 - 2,3-Dibromothiophene, 98+% - A12998 - Alfa Aesar

A12998 2,3-Dibromothiophene, 98+%

CAS-Nummer
3140-93-0
Synonyme

Größe Preis ($) Menge Verfügbarkeit
1g 17,27
5g 67,67
25g 212,80
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2,3-Dibromothiophene, 98+%

MDL
MFCD00005418
EINECS
221-542-6

Chemische Eigenschaften

Formel
C4H2Br2S
Molmasse
241.94
Siedepunkt
215-216°
Flammpunkt
>100°(212°F)
Dichte
2.135
Brechungsindex
1.6310
Sensitivität
Light Sensitive

Literaturverweise

Lithiation with n-BuLi occurs selectively at the 2-position, giving e.g. on carboxylation, 3-bromothiophene-2-carboxylic acid in good yield: Synthesis, 327 (1980). With 2 eq. of n-BuLi the dilithio-derivative is obtained, providing a useful route to 2,3-disubstituted thiophenes: Synthesis, 545 (1972).

/n

Metallation with LDA at low temperature results, not in the expected 5-lithio-derivative, but in rearrangement to 2,4-dibromo-5-lithiothiophene, an example of the "base-catalyzed halogen dance": Synthesis, 771 (1989):

/n

/n

GHS Gefahren- und Sicherheitshinweise

Gefahrenhinweise (EU): H315-H319

Causes skin irritation. Causes serious eye irritation.

Sicherheitshinweise: P280-P264-P305+P351+P338-P362-P321-P332+P313-P337+P313-P302+P352

Wear protective gloves/protective clothing/eye protection/face protection. Wash thoroughly after handling. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Take off contaminated clothing and wash before reuse. Specific treatment (see label). If skin irritation occurs: Get medical advice/attention. If eye irritation persists: IF ON SKIN: Wash with plenty of soap and water.

Weitere Referenzen

Beilstein
107512
Harmonized Tariff Code
2934.99
TSCA
No

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