Imidazole → (4-Nitro-benzyl) t-butyl-di-phenyl-silyl ether

HRID 612812

반응식

HRID 612812 반응식
[N+:1]([C:4]1[CH:11]=[CH:10][C:7]([CH2:8][OH:9])=[CH:6][CH:5]=1)([O-:3])=[O:2].N1C=CN=C1.[C:17]([Si:21]([C:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1)([C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1)Cl)([CH3:20])([CH3:19])[CH3:18]>CN(C=O)C.CCOCC>[C:17]([Si:21]([O:9][CH2:8][C:7]1[CH:6]=[CH:5][C:4]([N+:1]([O-:3])=[O:2])=[CH:11][CH:10]=1)([C:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1)[C:23]1[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=1)([CH3:20])([CH3:18])[CH3:19]

참가 물질

6

반응물 3

HCID 795ImidazoleHCID 692754-Nitrobenzyl alcoholHCID 94078tert-Butyldiphenylchlorosilane

생성물 1

HCID 15528110(4-Nitro-benzyl) t-butyl-di-phenyl-silyl ether

시약·촉매·용매 2

HCID 3283Diethyl Ether용매HCID 6228Dimethylformamide용매

실험 절차

To a stirred solution of 4-nitrobenzyl alcohol (1.00 g, 6.50 mmol) and imidazole (0.97 g, 14.10 mmol) in DMF (10.0 mL), t-butyl-diphenyl-chlorosilane (1.98 g, 1.87 mL, 7.20 mmol) was added over 10 min under nitrogen at room temperature. The reaction mixture was stirred for an additional 5 h, diluted with 75 mL Et2O, washed with H2O (5 times, 15 mL), dried (MgSO4) and evaporated under vacuum. An oil which crystallised on standing, resulted; yield: 2.54 g. After recrystallisation from EtOH 70%, 2.36 g (93%) of a white soiid is obtained mp 80-81° C. νmax /cm-1 (film): 2931. 2857 (CH2, asym., sym.), 1521. 1345 (NO2); 1H-NMR, δH : 1.06(9H, s, t-Bu), 4.92 (2H, s, CH2), 7.42-7.46 (5H, m, Ph), 7.63-7.65 (7H, m, Ph+Harom2+6), 8.23, (2H, d, J=8.23 Hz, Harom3+5); MS, (EI), (391.54); m/z: 334 (M-t-Bu, 100), 288 (M-t-Bu-NO2, 10), 256 (M-t-Bu-Ph, 20), 199 (Ph2SiOH+, 100); C23H25NO3Si.

후처리

  1. washwashed with H2O (5 times, 15 mL)
  2. dry with materialdried (MgSO4)
  3. customevaporated under vacuum
  4. customAn oil which crystallised
  5. customresulted
  6. customAfter recrystallisation from EtOH 70%, 2.36 g (93%) of a white soiid
  7. customis obtained mp 80-81° C. νmax /cm-1 (film)

출처 및 근거

ORD 기록
ord-ca54813aa4a94c6d958ac93a77406c0d
출처 데이터셋
uspto-grants-1999_12
특허 번호
US06005002

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