Hydrochloric Acid → 4-Cyclopropylbenzeneboronic acid

HRID 19829

반응식

HRID 19829 반응식
Br[C:2]1[CH:7]=[CH:6][C:5]([CH:8]2[CH2:10][CH2:9]2)=[CH:4][CH:3]=1.[B:11](OC(C)C)([O:16]C(C)C)[O:12]C(C)C.Cl>CCCCCC.C1COCC1.C1(C)C=CC=CC=1>[CH:8]1([C:5]2[CH:6]=[CH:7][C:2]([B:11]([OH:16])[OH:12])=[CH:3][CH:4]=2)[CH2:10][CH2:9]1

참가 물질

7

반응물 3

HCID 313Hydrochloric AcidHCID 21531Triisopropyl borateHCID 122213551-Bromo-4-cyclopropylbenzene

생성물 1

HCID 28494284-Cyclopropylbenzeneboronic acid

시약·촉매·용매 3

HCID 1140Toluene용매HCID 8028Tetrahydrofuran용매HCID 8058Hexane용매

반응 조건

온도
-70 °C

실험 절차

2.5 M nButyllithium in hexane (14.5 mL) is added dropwise to 1-bromo-4-cyclopropyl-benzene (5.92 g) in THF (14 mL) and toluene (50 mL) chilled to −70° C. The resultant solution is stirred at −70° C. for 30 min before triisopropyl borate (8.5 mL) is added. The solution is warmed to −20° C. and then treated with 4 M aqueous hydrochloric acid (15.5 mL). The reaction mixture is further warmed to room temperature and then the organic phase is separated. The aqueous phase is extracted with ethyl acetate and the combined organic phases are dried (sodium sulphate). The solvent is evaporated and the residue is washed with a mixture of ether and cyclohexane to give the product as a colorless solid.

후처리

  1. additionis added
  2. temperatureThe solution is warmed to −20° C.
  3. temperatureThe reaction mixture is further warmed to room temperature
  4. customthe organic phase is separated
  5. extractionThe aqueous phase is extracted with ethyl acetate
  6. dry with materialthe combined organic phases are dried (sodium sulphate)
  7. customThe solvent is evaporated
  8. washthe residue is washed with a mixture of ether and cyclohexane

출처 및 근거

ORD 기록
ord-0ba6ce0f6e0e40739ff825ced6ba4d1c
출처 데이터셋
uspto-grants-2010_06
특허 번호
US07745414B2

연결된 노트

불러오는 중…