Cesium carbonate → 3-(1,4-Dioxa-8-aza-spiro[4.5]dec-8-yl)-4-methyl-benzoic acid methyl ester

HRID 2092582

반응식

HRID 2092582 반응식
[O:1]1[C:5]2([CH2:10][CH2:9][NH:8][CH2:7][CH2:6]2)[O:4][CH2:3][CH2:2]1.[CH3:11][O:12][C:13](=[O:22])[C:14]1[CH:19]=[CH:18][C:17]([CH3:20])=[C:16](Br)[CH:15]=1.C(=O)([O-])[O-].[Cs+].[Cs+]>C1(C)C=CC=CC=1>[CH3:11][O:12][C:13](=[O:22])[C:14]1[CH:19]=[CH:18][C:17]([CH3:20])=[C:16]([N:8]2[CH2:9][CH2:10][C:5]3([O:4][CH2:3][CH2:2][O:1]3)[CH2:6][CH2:7]2)[CH:15]=1

참가 물질

5

반응물 3

HCID 10796Cesium carbonateHCID 674351,4-Dioxa-8-azaspiro(4.5)decaneHCID 7015747Methyl 3-bromo-4-methylbenzoate

생성물 1

HCID 673546753-(1,4-Dioxa-8-aza-spiro[4.5]dec-8-yl)-4-methyl-benzoic acid methyl ester

시약·촉매·용매 1

HCID 1140Toluene용매

실험 절차

A mixture of 2,2′-Bis(diphenylphosphino)1,1′-binaphthyl[BINAP] (54.35 mg, 0.085 mmol) and Palladium(II)acetate[Pd(OAc)2] (6.95 mg, 0.028 mmol) in dry toluene (3 ml) was stirred vigorously and nitrogen was bubbled through the suspension for 30 minutes. To this, 1,4-Dioxa-8-aza-spiro[4.5]-decane (100 mg, 0.699 mmol), 3-Bromo-4-methyl-benzoic acid methyl ester (192.1 mg, 0.839 mmol) and dry Cesium Carbonate (683.5 mg, 2.09 mmol) was added. Nitrogen was bubbled through for another 30 minutes; the mixture was allowed to reflux overnight. The mixture was cooled, diluted with ethylacetate, water was added and the layers separated. The aqueous layer was extracted with ethyl acetate) and the two organic extracts were combined. The organics were washed with brine, then dried (sodium sulfate), filtered and concentrated. Further purification by silica gel chromatography using 5-10% ethyl acetate/Hexane as eluent provided 3-(1,4-Dioxa-8-aza-spiro[4.5]dec-8-yl)-4-methyl-benzoic acid methyl ester [11] as a yellow solid [150.5 mg, 61.7%]

후처리

  1. customnitrogen was bubbled through the suspension for 30 minutes
  2. customNitrogen was bubbled through for another 30 minutes
  3. temperatureto reflux overnight
  4. temperatureThe mixture was cooled
  5. additiondiluted with ethylacetate, water
  6. additionwas added
  7. customthe layers separated
  8. extractionThe aqueous layer was extracted with ethyl acetate) and the two organic extracts
  9. washThe organics were washed with brine
  10. dry with materialdried (sodium sulfate)
  11. filtrationfiltered
  12. concentrationconcentrated
  13. customFurther purification by silica gel chromatography

출처 및 근거

ORD 기록
ord-affa85dd8a3b447eb96d9924e465951f
출처 데이터셋
uspto-grants-2013_05
특허 번호
US08440679B2

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