1-(4,5-DIBROMO-2-THIENYL)-1-ETHANONE synthesis

4synthesis methods

Product Name:1-(4,5-DIBROMO-2-THIENYL)-1-ETHANONE
CAS Number:7209-12-3
Molecular formula:C6H4Br2OS
Molecular Weight:283.97

3140-93-0 Synthesis

3140-93-0
295 suppliers
$6.00/5g

75-36-5 Synthesis

75-36-5
558 suppliers
$17.92/100G

7209-12-3
15 suppliers
$219.00/1g

Yield:7209-12-3 68%

Reaction Conditions:

with aluminum (III) chloride in dichloromethane; for 2 h;Cooling with ice;

Steps:

1.1 Step 1: 2-acetyl-4,5-dibromothiophene (1-1)

A mixture of 1 g of 2,3-dibromothiophene and 0.36 g of acetyl chloride was dissolved in 10 ml of dichloromethane, and 0.72 g of aluminum trichloride was added in five batches under ice bath conditions. The reaction was carried out in ice bath for 2 hours. TLC showed the reaction was complete , The reaction solution was poured into dilute hydrochloric acid, extracted with dichloromethane, the organic phase was dried over anhydrous sodium sulfate, concentrated to dryness, and the residue was column chromatographed with ethyl acetate: petroleum ether = 1:100 to obtain an orange solid ( 1-1) 0.8 g, yield 68%.

References:

CN112724127,2021,A Location in patent:Paragraph 0378-0382

3140-93-0 Synthesis

3140-93-0
295 suppliers
$6.00/5g

64-19-7 Synthesis