Boron trifluoride etherate → (2-Chloro-5-((3S,4R,5R,6R)-3,4,5-tris(benzyloxy)-6-(benzyloxymethyl)-tetrahydro-2H-pyran-2-yl)benzyloxy)triisopropylsilane

HRID 46187노트

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HRID 46187 반응식
[CH2:1]([O:8][C@@H:9]1[C@@H:14]([O:15][CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[C@H:13]([O:23][CH2:24][C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)[C@@H:12]([CH2:31][O:32][CH2:33][C:34]2[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=2)[O:11][C:10]1([C:41]1[CH:46]=[CH:45][C:44]([Cl:47])=[C:43]([CH2:48][O:49][Si:50]([CH:57]([CH3:59])[CH3:58])([CH:54]([CH3:56])[CH3:55])[CH:51]([CH3:53])[CH3:52])[CH:42]=1)O)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C([SiH](CC)CC)C.B(F)(F)F.CCOCC>ClCCl>[Cl:47][C:44]1[CH:45]=[CH:46][C:41]([CH:10]2[C@H:9]([O:8][CH2:1][C:2]3[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=3)[C@@H:14]([O:15][CH2:16][C:17]3[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=3)[C@H:13]([O:23][CH2:24][C:25]3[CH:26]=[CH:27][CH:28]=[CH:29][CH:30]=3)[C@@H:12]([CH2:31][O:32][CH2:33][C:34]3[CH:35]=[CH:36][CH:37]=[CH:38][CH:39]=3)[O:11]2)=[CH:42][C:43]=1[CH2:48][O:49][Si:50]([CH:57]([CH3:59])[CH3:58])([CH:51]([CH3:53])[CH3:52])[CH:54]([CH3:56])[CH3:55]

참가 물질

5

반응물 3

HCID 8000Boron trifluoride etherateHCID 12052TriethylsilaneHCID 67287055(3R,4S,5R,6R)-3,4,5-Tris(benzyloxy)-6-(benzyloxymethyl)-2-(4-chloro-3-((triisopropylsilyloxy)methyl)phenyl)-tetrahydro-2H-pyran-2-ol

생성물 1

HCID 67287190(2-Chloro-5-((3S,4R,5R,6R)-3,4,5-tris(benzyloxy)-6-(benzyloxymethyl)-tetrahydro-2H-pyran-2-yl)benzyloxy)triisopropylsilane

시약·촉매·용매 1

HCID 6344Dichloromethane용매

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온도
-10 °C

실험 절차

To a stirred −50° C. solution of (3R,4S,5R,6R)-3,4,5-tris(benzyloxy)-6-(benzyloxymethyl)-2-(4-chloro-3-((triisopropylsilyloxy)methyl)phenyl)tetra-hydro-2H-pyran-2-ol (198 mmol) from Step 4 in dichloromethane (500 mL) was added triethylsilane (63 mL, 396 mmol) followed by boron trifluoride diethyl etherate (50 mL, 396 mmol) at a rate such that the reaction temperature was maintained between −40 and −50° C. The solution was allowed to warm to −10° C. over 2 h prior to quenching with saturated potassium carbonate solution. After removal of organic volatiles under reduced pressure, the residue was partitioned between ethyl acetate and water. Following extraction of the aqueous layer with ethyl acetate, the combined organic layers were washed with water prior to drying over magnesium sulfate. Filtration and concentration under reduced pressure yielded the title compound as a yellow oil which was used without further purification.

후처리

  1. temperaturewas maintained between −40 and −50° C
  2. customto quenching with saturated potassium carbonate solution
  3. customAfter removal of organic volatiles under reduced pressure
  4. customthe residue was partitioned between ethyl acetate and water
  5. extractionextraction of the aqueous layer with ethyl acetate
  6. washthe combined organic layers were washed with water
  7. dry with materialto drying over magnesium sulfate
  8. filtrationFiltration and concentration under reduced pressure

출처 및 근거

ORD 기록
ord-397203220aa746e9b261b147a0ed6f68
출처 데이터셋
uspto-grants-2013_09
특허 번호
US08541380B2

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