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

A12998 2,3-Dibromothiophene, 98+%

CAS Number
3140-93-0
Synonyms

Size Price ($) Quantity Availability
1g 17.27
5g 67.67
25g 212.80
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2,3-Dibromothiophene, 98+%

MDL
MFCD00005418
EINECS
221-542-6

Chemical Properties

Formula
C4H2Br2S
Formula Weight
241.94
Boiling Point
215-216°
Flash Point
>100°(212°F)
Density
2.135
Refractive Index
1.6310
Sensitivity
Light Sensitive

Literature References

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 Hazard and Precautionary Statements

Hazard Statements: H315-H319

Causes skin irritation. Causes serious eye irritation.

Precautionary Statements: 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.

Other References

Beilstein
107512
Harmonized Tariff Code
2934.99
TSCA
No

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