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Chemical Structure| 3141-26-2 Chemical Structure| 3141-26-2
Chemical Structure| 3141-26-2

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CAS No.: 3141-26-2

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Product Details of 3,4-Dibromothiophene

CAS No. :3141-26-2
Formula : C4H2Br2S
M.W : 241.93
SMILES Code : C1=C(Br)C(=CS1)Br
MDL No. :MFCD00005465
InChI Key :VGKLVWTVCUDISO-UHFFFAOYSA-N
Pubchem ID :18452

Safety of 3,4-Dibromothiophene

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H315-H319-H335
Precautionary Statements:P261-P305+P351+P338

Application In Synthesis of 3,4-Dibromothiophene

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Upstream synthesis route of [ 3141-26-2 ]
  • Downstream synthetic route of [ 3141-26-2 ]

[ 3141-26-2 ] Synthesis Path-Upstream   1~1

  • 1
  • [ 3141-26-2 ]
  • [ 73882-41-4 ]
YieldReaction ConditionsOperation in experiment
78%
Stage #1: With n-butyllithium In diethyl ether at -78℃; for 1 h; Inert atmosphere
Stage #2: With iodine In diethyl ether at -78 - 25℃; for 1 h;
1) Prepared according to the flow chart in Figure 1 1)3,4-dibromothiophene (24.2 g, 100 mmol) was dissolved in anhydrous diethyl ether,N2 protection,Cooling to -78 ,N-BuLi (66 ml, 105 mmol, 1.6 M) was slowly added dropwise,After reaction for 1 h at -78 & lt; 0 & gt; C, I2 (26.67 g, 105 mmol)Continue stirring for 1 h and warm to room temperature (25 ° C).The reaction solution was quenched with NaHSO3, extracted with ether, dried over Mg2SO4, dried and distilled under reduced pressure to give 3-bromo-4-iodothiophene (22.55 g, 78percent)Color liquid 2.
References: [1] Patent: CN106317070, 2017, A, . Location in patent: Paragraph 0104; 0105; 0106.
[2] Journal of Heterocyclic Chemistry, 1980, vol. 17, # 1, p. 171 - 174.
[3] Journal of Organic Chemistry, 1982, vol. 47, # 16, p. 3177 - 3180.
 

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