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[ CAS No. 70728-89-1 ] {[proInfo.proName]}

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Chemical Structure| 70728-89-1
Chemical Structure| 70728-89-1
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Product Details of [ 70728-89-1 ]

CAS No. :70728-89-1 MDL No. :MFCD20921696
Formula : C20H25Br Boiling Point : No data available
Linear Structure Formula :(C6H4C4H9)(C6H3BrC4H9) InChI Key :OPPSYCGZHQVDPM-UHFFFAOYSA-N
M.W : 345.32 Pubchem ID :12541264
Synonyms :

Safety of [ 70728-89-1 ]

Signal Word:Warning Class:
Precautionary Statements:P280-P305+P351+P338 UN#:
Hazard Statements:H302 Packing Group:
GHS Pictogram:

Application In Synthesis of [ 70728-89-1 ]

* 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.

  • Downstream synthetic route of [ 70728-89-1 ]

[ 70728-89-1 ] Synthesis Path-Downstream   1~4

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  • [ 1625-91-8 ]
  • [ 70728-89-1 ]
YieldReaction ConditionsOperation in experiment
98.6% With bromine; iodine; In dichloromethane; at 5 - 20℃; for 2h; EXAMPLE 1 1 g of <strong>[1625-91-8]4,4'-di-tert-butylbiphenyl</strong> were dissolved in 10 g of dichloromethane, and 30 mg of iodine were added. The mixture was then cooled to 5 C. Over a period of 1 h, 650 mg of bromine were added. The mixture was then stirred at room temperature for 1 h. For work-up, 3 ml of a 10% strength solution of NaHSO3 were added, the phases were separated and the organic phase was washed until neutral, dried and concentrated using a rotary evaporator. This gave 1.28 g of 2-bromo-<strong>[1625-91-8]4,4'-di-tert-butylbiphenyl</strong> (98.6% of theory).
91.5% With bromine; iodine; In dichloromethane; for 12h;Cooling with ice; In a 100 ml three-necked round bottom flask of adding 10g4, 4' - di-tert-butyl biphenyl (37.6mmol), proper amount of iodine simple substance, 15 ml dichloromethane, in ice water bath stirring for about 10min. At the same time added to the constant pressure dropping funnel in 5 ml dichloromethane and 2.3 ml bromine, in order to 2 seconds/drop in the speed of the bottle into the reaction, the reaction 12h after stop, will 30 ml saturated sodium sulfite solution is added in the reaction solution, stirring until the solution turns into yellow, then transferred to a separatory funnel in the solution, the violent oscillation, layered, collecting the lower organic matter, to the collected organic layer in adding anhydrous sodium sulfate drying, a certain time period, filtering, and steaming and removing the solvent in the filtrate, to obtain white crude product, in the crude product is added in proper amount of absolute ethanol, heating and stirring, reflux 30min, cooling at a standstill, with the white solid precipitated, filtered, anhydrous ethanol washing product, to obtain white solid, yield of 91.5%. Mp: 90 - 91 C
With bromine;iron(III) chloride; In chloroform; at 0℃; To a solution of 4,4'-di-tert-butylbirhohenyl (3.99 g, 15 mmol) and anhydrous ferric chloride (20 mg) in chloroform (30ml) at 0 C was added dropwise bromine (2.4 g, 15 mmol) solved in chloroform (10 ml). The reaction was stirred overnight The reaction mixture was quenched with sodum carbonate until the orange color disappeared. Then washed with water and extracted with hexane (50 ml) 3 times. The combined organic phase was washed with brine, dried over anhydrous MgSO4 and concentrated in vacuo. 1HNMR measurement indicated tihat the conversion ratio is about 50%. The crude product was directly used for further reaction.
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  • [ 853234-57-8 ]
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  • [ 915406-69-8 ]
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