Boron trifluoride etherate → Benzyl 8-ethyl-7-((3aR,4R,7R,7aR)-7-methoxy-6,6-dimethyl-2-oxotetrahydro-3aH-[1,3]dioxolo[4,5-c]pyran-4-yloxy)-2-oxo-2H-chromen-3-ylcarbamate

HRID 1511236노트

반응식

HRID 1511236 반응식
B(F)(F)F.CCOCC.[CH2:10]([C:12]1[C:13]([OH:34])=[CH:14][CH:15]=[C:16]2[C:21]=1[O:20][C:19](=[O:22])[C:18]([NH:23][C:24](=[O:33])[O:25][CH2:26][C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1)=[CH:17]2)[CH3:11].ClC(Cl)(Cl)C(=N)O[C@H:39]1[C@@H:44]2[O:45][C:46](=[O:48])[O:47][C@@H:43]2[C@@H:42]([O:49][CH3:50])[C:41]([CH3:52])([CH3:51])[O:40]1.C(N(CC)CC)C>C(Cl)Cl>[CH2:10]([C:12]1[C:13]([O:34][C@H:39]2[C@@H:44]3[O:45][C:46](=[O:48])[O:47][C@@H:43]3[C@@H:42]([O:49][CH3:50])[C:41]([CH3:52])([CH3:51])[O:40]2)=[CH:14][CH:15]=[C:16]2[C:21]=1[O:20][C:19](=[O:22])[C:18]([NH:23][C:24](=[O:33])[O:25][CH2:26][C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1)=[CH:17]2)[CH3:11]

참가 물질

6

반응물 4

HCID 8000Boron trifluoride etherateHCID 8471TriethylamineHCID 25138792Benzyl 8-ethyl-7-hydroxy-2-oxo-2H-chromen-3-ylcarbamateHCID 67094064(3aR,4S,7R,7aR)-7-methoxy-6,6-dimethyl-2-oxo-tetrahydro-3aH-[1.3]dioxolo[4,5-c]pyran-4-yl 2,2,2-trichloroacetimidate

생성물 1

HCID 25140543Benzyl 8-ethyl-7-((3aR,4R,7R,7aR)-7-methoxy-6,6-dimethyl-2-oxotetrahydro-3aH-[1,3]dioxolo[4,5-c]pyran-4-yloxy)-2-oxo-2H-chromen-3-ylcarbamate수율 51%

시약·촉매·용매 1

HCID 6344Dichloromethane용매

실험 절차

Boron trifluoride etherate (19.0 μL, 0.15 mmol) was added to 23h (171 mg, 0.51 mmol) and (3aR,4S,7R,7aR)-7-methoxy-6,6-dimethyl-2-oxo-tetrahydro-3aH-[1.3]dioxolo[4,5-c]pyran-4-yl 2,2,2-trichloroacetimidate (183 mg, 0.51 mmol) in anhydrous CH2Cl2 (11.0 mL). After stirring at room temperature for 24 hours, triethylamine (150 μL) was added and the solvent was concentrated. The residue was purified via column chromatography (SiO2, 40:1 CH2Cl2:Acetone) to give 25h as a colorless foam (138 mg, 51%): 1H NMR (CD2Cl2, 400 MHz) 8.29 (s, 1H), 7.62 (s, 1H), 7.47-7.38 (m, 5H), 7.36 (d, J=8.8 Hz, 1H), 7.19 (d, J=8.4 Hz, 1H), 5.81 (d, J=2.4 Hz, 1H), 5.25 (s, 2H), 5.10 (dd, J=8.0, 2.0 Hz, 1H), 5.02 (t, J=7.8 Hz, 1H), 3.55 (s, 3H), 3.41 (d, J=7.2 Hz, 1H), 2.87 (q, J=7.4 Hz, 2H), 1.42 (s, 3H), 1.28 (s, 3H), 1.21 (t, J=7.4 Hz, 3H); 13C NMR (CD2Cl2, 100 MHz) 158.5, 154.8, 153.2, 153.1, 148.4, 136.0, 128.6 (2C), 128.4, 128.1, 125.6, 122.4, 121.5, 120.7, 114.8, 111.4, 94.8, 82.7, 77.9, 77.2, 76.6, 67.3, 60.3, 27.3, 22.3, 16.4, 13.6; IR (film) νmax 3400, 2980, 2937, 2359, 2339, 1817, 1711, 1607, 1524, 1383, 1366, 1227, 1205, 1175, 1101, 1040, 906, 768, 737, 700 cm−1; [M+Na]+ calcd for C28H29NO10, 562.1689. found, 562.1689.

후처리

  1. concentrationthe solvent was concentrated
  2. customThe residue was purified via column chromatography (SiO2, 40:1 CH2Cl2:Acetone)

출처 및 근거

ORD 기록
ord-d4255eb5eba44037b7a6962b65163b22
출처 데이터셋
uspto-grants-2012_07
특허 번호
US08212011B2

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