Triisopropyl borate → 2-Methylpentane

HRID 361430

반응식

HRID 361430 반응식
C([Li])CCC.Br[C:7]1[CH:12]=[CH:11][C:10]([CH2:13][CH2:14][CH3:15])=[CH:9][CH:8]=1.[B:16](OC(C)C)([O:21]C(C)C)[O:17]C(C)C.[Cl-].[NH4+]>C1COCC1.O>[CH3:7][CH2:8][CH2:9][CH:10]([CH3:13])[CH3:11].[CH2:13]([C:10]1[CH:11]=[CH:12][C:7]([B:16]([OH:21])[OH:17])=[CH:8][CH:9]=1)[CH2:14][CH3:15]

참가 물질

8

반응물 4

HCID 21531Triisopropyl borateHCID 25517Ammonium ChlorideHCID 1363741-Bromo-4-propylbenzeneHCID 178418339Butyllithium

생성물 2

HCID 78922-MethylpentaneHCID 4100861(4-Propylphenyl)boronic acid

시약·촉매·용매 2

HCID 962Water용매HCID 8028Tetrahydrofuran용매

반응 조건

온도
-70 °C

실험 절차

n-Butyl lithium (34 ml of a 1.6M solution in hexanes) was added dropwise to a stirred solution of 1-bromo-4-propylbenzene (9.96 g) in dry THF (30 ml) at -70° C. under argon. The reaction was stirred for 1 hour at -70° C. before addition of triisopropyl borate (12.7 ml) and then stirred for a further 90 minutes at -70° C. before addition of saturated aqueous ammonium chloride solution (30 ml). The reaction was stirred at -70° C. for a further 10 minutes, water (100 ml) was added and the reaction was allowed to warm to ambient temperature. The reaction mixture was extracted with diethyl ether (3×50 ml), the combined organic layers were dried (MgSO4) and then the solvent was removed by evaporation. Trituration of the resultant clear oil with isohexane gave 4-propylphenylboronic acid as a white solid, 6.7 g, mass spectrum (negative electrospray (-ve ESP)): 163 (M-H)-.

후처리

  1. temperatureto warm to ambient temperature
  2. extractionThe reaction mixture was extracted with diethyl ether (3×50 ml)
  3. dry with materialthe combined organic layers were dried (MgSO4)
  4. customthe solvent was removed by evaporation

출처 및 근거

ORD 기록
ord-055e5f2ccb6c49388ddbaa7e992ed123
출처 데이터셋
uspto-grants-1999_02
특허 번호
US05866568

연결된 노트

불러오는 중…