Boron trifluoride etherate → Benzyl 8-benzyl-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 1511234노트

반응식

HRID 1511234 반응식
B(F)(F)F.CCOCC.[CH2:10]([C:17]1[C:18]([OH:39])=[CH:19][CH:20]=[C:21]2[C:26]=1[O:25][C:24](=[O:27])[C:23]([NH:28][C:29](=[O:38])[O:30][CH2:31][C:32]1[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=1)=[CH:22]2)[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1.ClC(Cl)(Cl)C(=N)O[C@H:44]1[C@@H:49]2[O:50][C:51](=[O:53])[O:52][C@@H:48]2[C@@H:47]([O:54][CH3:55])[C:46]([CH3:57])([CH3:56])[O:45]1.C(N(CC)CC)C>C(Cl)Cl>[CH2:10]([C:17]1[C:18]([O:39][C@H:44]2[C@@H:49]3[O:50][C:51](=[O:53])[O:52][C@@H:48]3[C@@H:47]([O:54][CH3:55])[C:46]([CH3:57])([CH3:56])[O:45]2)=[CH:19][CH:20]=[C:21]2[C:26]=1[O:25][C:24](=[O:27])[C:23]([NH:28][C:29](=[O:38])[O:30][CH2:31][C:32]1[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=1)=[CH:22]2)[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1

참가 물질

6

반응물 4

HCID 8000Boron trifluoride etherateHCID 8471TriethylamineHCID 25138790Benzyl 8-benzyl-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 25140542Benzyl 8-benzyl-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 39%

시약·촉매·용매 1

HCID 6344Dichloromethane용매

실험 절차

Boron trifluoride etherate (7.80 μL, 0.062 mmol) was added to 23e (80.0 mg, 0.21 mmol) and (3aR,4S,7R,7aR)-7-methoxy-6,6-dimethyl-2-oxo-tetrahydro-3 aH-[1.3]dioxolo[4,5-c]pyran-4-yl 2,2,2-trichloroacetimidate (299 mg, 0.83 mmol) in anhydrous CH2Cl2 (5.20 mL). After stirring at room temperature for 48 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 25e as a colorless foam (47.0 mg, 39%): 1H MMR (CDCl3, 500 MHz) 8.22 (s, 1H), 7.46 (s, 1H), 7.35-7.27 (m, 5H), 7.17-7.06 (m, 5H), 6.86 (d, J=10 Hz, 1H), 6.01 (d, J=10 Hz, 1H), 5.65 (d, J=1.6 Hz, 1H), 5.23 (s, 2H), 5.16 (s, 2H), 4.77-4.70 (m, 1H), 4.10 (s, 1H), 3.50 (s, 3H), 3.28 (s, 1H), 3.16 (d, J=7.4 Hz, LH), 1.25 (s, 3H), 1.18 (s, 3H); 13C NMR (CDCl3, 125 MHz) 155.1, 153.2 (2C), 153.1, 148.6 (2C), 139.6 (2C), 128.7, 128.6 (2C), 128.4 (2C), 128.3 (2C), 128.3 (2C), 126.5, 126.2, 123.1, 122.4, 121.7, 117.6, 114.9, 111.5, 94.7, 82.8, 67.6, 60.6 (2C), 29.7, 27.6, 21.9; IR (film) νmax 2926, 2854, 2359, 2341, 1811, 1709, 1607, 1522, 1456, 1381, 1366, 1259, 1209, 1171, 1078, 1049, 968, 766, 700 cm−1; HRMS (ESI+) m/z: [M+H]+ calcd for C33H31NO10, 602.2026. found, 602.2053.

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-19318b0ef9f447bfbb5c6e67ee745b53
출처 데이터셋
uspto-grants-2012_07
특허 번호
US08212011B2

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