Imidazole → diisopropyl (E)-3-acetoxymethyl-4-t-butyldiphenylsilyloxybut-1-enylphosphonate

HRID 1708086노트

반응식

HRID 1708086 반응식
[C:1]([O:4][CH2:5][CH:6]([CH2:19][OH:20])/[CH:7]=[CH:8]/[P:9](=[O:18])([O:14][CH:15]([CH3:17])[CH3:16])[O:10][CH:11]([CH3:13])[CH3:12])(=[O:3])[CH3:2].N1C=CN=C1.[Si:26](Cl)([C:39]([CH3:42])([CH3:41])[CH3:40])([C:33]1[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=1)[C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1>C1COCC1>[C:1]([O:4][CH2:5][CH:6]([CH2:19][O:20][Si:26]([C:39]([CH3:42])([CH3:41])[CH3:40])([C:33]1[CH:34]=[CH:35][CH:36]=[CH:37][CH:38]=1)[C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1)/[CH:7]=[CH:8]/[P:9](=[O:18])([O:14][CH:15]([CH3:16])[CH3:17])[O:10][CH:11]([CH3:13])[CH3:12])(=[O:3])[CH3:2]

참가 물질

5

반응물 3

HCID 795ImidazoleHCID 94078tert-ButyldiphenylchlorosilaneHCID 10357901diisopropyl (E)-3-acetoxymethyl-4-hydroxybut-1-enylphosphonate

생성물 1

HCID 21765581diisopropyl (E)-3-acetoxymethyl-4-t-butyldiphenylsilyloxybut-1-enylphosphonate수율 94.3%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

실험 절차

To a solution of diisopropyl (E)-3-acetoxymethyl-4-hydroxybut-1-enylphosphonate (3 g, 9.7 mmol ) and imidazole (1.7 g, 25 mmol) in anhydrous THF (60 ml) at 0° C. was added t-butyldiphenylsilylchloride (3.2 ml, 12.7 mmol). After stirring at room temperature for 3 h, the solvent was removed and the residue was partitioned between chloroform (100 ml) and brine (30 ml). The organic phase was dried (MgSo4), evaporated in vacuo and chromatographed on silica gel, eluting with chloroform of increasing polarity to chloroform-methanol (100:1) to give diisopropyl (E)-3-acetoxymethyl-4-t-butyldiphenylsilyloxybut-1-enylphosphonate as an oil (5 g, 94%); υmax (film) 3071, 3050, 2977, 2931, 2858, 1743, 1630, 1582, 1472,and 1425 cm-1 ; δH (CDCl3) 1.05 [9H, s, C(CH3)3 ], 1.26 (3H, d, J 6 Hz, CH3CH), 1.27 (3H, d, J 6 Hz, CH3CH), 1.32 [6H, d, J 6.3 Hz, (CH3)2CH], 1.98 (3H, s, CH3CO), 2.74 (1H, m, CH), 3.72 (2H, m, CH2), 4.22 (2H, m, CH2), 4.65 (2H, m, 2×CH(CH3)2 ], 5.76 (1H, ddd, J 1, 17 and 18 Hz, PCH=CH), 6.99 (1H, ddd, J 7, 17 and 22 Hz, PCH=CH), 7.3-7.7 (10H, m, 2×C6H5) (Found: C, 63.42; H, 8.22%. C29H43O6PSi requires C, 63.71; H, 7.93%.).

후처리

  1. customthe solvent was removed
  2. customthe residue was partitioned between chloroform (100 ml) and brine (30 ml)
  3. customThe organic phase was dried (MgSo4)
  4. customevaporated in vacuo
  5. customchromatographed on silica gel
  6. washeluting with chloroform
  7. temperatureof increasing polarity to chloroform-methanol (100:1)

출처 및 근거

ORD 기록
ord-5d137eb318c046bcb6dae21e376348e4
출처 데이터셋
uspto-grants-1994_10
특허 번호
US05356886

반응 노트

불러오는 중…