Iodine → Dimethyl-4-tert-butylbenzylchloromethylsilane

HRID 34526

반응식

HRID 34526 반응식
[Mg].[C:2]([C:6]1[CH:13]=[CH:12][C:9]([CH2:10]Cl)=[CH:8][CH:7]=1)([CH3:5])([CH3:4])[CH3:3].II.[Cl:16][CH2:17][Si:18]([CH3:21])([CH3:20])Cl.[Cl-].[NH4+]>C(OCC)C>[CH3:20][Si:18]([CH3:21])([CH2:10][C:9]1[CH:12]=[CH:13][C:6]([C:2]([CH3:5])([CH3:4])[CH3:3])=[CH:7][CH:8]=1)[CH2:17][Cl:16]

참가 물질

7

반응물 5

HCID 807IodineHCID 25517Ammonium ChlorideHCID 74393Silane, chloro(chloromethyl)dimethyl-HCID 88198Benzene, 1-(chloromethyl)-4-(1,1-dimethylethyl)-2회HCID 5462224Magnesium

생성물 1

HCID 70420968Dimethyl-4-tert-butylbenzylchloromethylsilane

시약·촉매·용매 1

HCID 3283Diethyl Ether용매3회

실험 절차

1.2 g (0.05M) of magnesium shavings are charged into 20 ml of diethyl ether. After the addition of about 1 ml of 4-tert-butylbenzyl chloride, the batch is heated to boiling point and a number of iodine crsytals are added. After the onset of the reaction, the rest of the 4-tert-butylbenzyl chloride (a total of 10 g [0.055M] in 80 ml of diethyl ether) is added dropwise such that the temperature is kept at 25°-30° C. The reaction mixture is stirred further for 2 hours at room temperature. 7.2 g (0.05M) of chloromethyldimethylchlorosilane in 20 ml of diethyl ether are then added dropwise at room temperature, and the mixture is stirred further overnight at room temperature. With ice cooling, 100 ml of a saturated solution of ammonium chloride are added to the reaction mixture, and the organic phase is separated, diluted with ethyl acetoacetate and washed three times with water. The batch is dried over sodium sulfate and filtered, and the filtrate is concentrated under a water jet vacuum. The crude intermediate so obtained is cooled to 0° C. and filtered, affording 11.2 g (88% of theory) of the desired intermediate as filtrate. For further purification, the product can be distilled under a water jet vacuum (boiling point: 149°-150° C./2000 Pa).

후처리

  1. temperaturethe batch is heated
  2. customAfter the onset of the reaction
  3. customis kept at 25°-30° C
  4. stirringthe mixture is stirred further overnight at room temperature
  5. customthe organic phase is separated
  6. additiondiluted with ethyl acetoacetate
  7. washwashed three times with water
  8. dry with materialThe batch is dried over sodium sulfate
  9. filtrationfiltered
  10. concentrationthe filtrate is concentrated under a water jet vacuum
  11. customThe crude intermediate so obtained
  12. temperatureis cooled to 0° C.
  13. filtrationfiltered

출처 및 근거

ORD 기록
ord-f442658e4b114f5dacca10509b95b8b9
출처 데이터셋
uspto-grants-1988_08
특허 번호
US04762826

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