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Water → N-[(4aR,6R,8aS)-6-[(benzyloxy)methyl]-8a-(2,4-difluorophenyl)-4,4a,5,6,8,8a-hexahydropyrano[3,4-d][1,3]thiazin-2-yl]benzamide

HRID 1478704
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1478704
N1C=CC=CC=1.[CH2:7]([O:14][CH2:15][C@@H:16]1[O:21][CH2:20][C@@:19]([NH:30][C:31]([NH:33][C:34](=[O:41])[C:35]2[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=2)=[S:32])([C:22]2[CH:27]=[CH:26][C:25]([F:28])=[CH:24][C:23]=2[F:29])[C@H:18]([CH2:42]O)[CH2:17]1)[C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1.FC(F)(F)S(OS(C(F)(F)F)(=O)=O)(=O)=O.O>ClCCl>[CH2:7]([O:14][CH2:15][C@@H:16]1[O:21][CH2:20][C@:19]2([C:22]3[CH:27]=[CH:26][C:25]([F:28])=[CH:24][C:23]=3[F:29])[N:30]=[C:31]([NH:33][C:34](=[O:41])[C:35]3[CH:36]=[CH:37][CH:38]=[CH:39][CH:40]=3)[S:32][CH2:42][C@@H:18]2[CH2:17]1)[C:8]1[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=1
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 4

HCID 962WaterHCID 1049PyridineHCID 67749Trifluoromethanesulfonic anhydrideHCID 86701080N-{[(3S,4R,6R)-6-[(benzyloxy)methyl]-3-(2,4-difluorophenyl)-4-(hydroxymethyl)tetrahydro-2H-pyran-3-yl]carbamothioyl}benzamide

Produkt 1

HCID 86729526N-[(4aR,6R,8aS)-6-[(benzyloxy)methyl]-8a-(2,4-difluorophenyl)-4,4a,5,6,8,8a-hexahydropyrano[3,4-d][1,3]thiazin-2-yl]benzamide

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel2×

Reaktionsbedingungen

Temperatur
-55 °C

Versuchsvorschrift

Pyridine (11.0 mL, 137 mmol) was added to a solution of N-{[(3S,4R,6R)-6-[(benzyloxy)methyl]-3-(2,4-difluorophenyl)-4-(hydroxymethyl)tetrahydro-2H-pyran-3-yl]carbamothioyl}benzamide (C7) (19.00 g, 36.08 mmol) in dichloromethane (150 mL), and the resulting solution was cooled to −50 to −60° C. Trifluoromethanesulfonic anhydride (12.1 mL, 71.9 mmol) in dichloromethane (50 mL) was added drop-wise, and the reaction mixture was gradually warmed to −5° C. over 3 hours. Water was added, and the aqueous layer was extracted with dichloromethane. The combined organic layers were washed with saturated aqueous sodium chloride solution, dried over magnesium sulfate, filtered, and concentrated in vacuo. Purification via silica gel chromatography (Gradient: 20% to 40% ethyl acetate in heptane) provided the product as a yellow foamy solid. Yield: 15.51 g, 30.50 mmol, 85%. LCMS m/z 509.2 [M+H+]. 1H NMR (400 MHz, CDCl3) δ 8.23 (br d, J=7 Hz, 2H), 7.37-7.57 (br m, 4H), 7.24-7.36 (m, 5H), 6.85-6.97 (m, 2H), 4.58 (AB quartet, upfield signals are slightly broadened, JAB=11.9 Hz, ΔνAB=23.5 Hz, 2H), 4.17 (br d, J=12 Hz, 1H), 3.90-3.97 (m, 1H), 3.83 (br d, J=12 Hz, 1H), 3.64 (dd, half of ABX pattern, J=10.1, 6.4 Hz, 1H), 3.50 (dd, half of ABX pattern, J=10.2, 4.4 Hz, 1H), 3.11-3.21 (br m, 1H), 3.02 (dd, J=12.9, 4.1 Hz, 1H), 2.64 (br d, J=13 Hz, 1H), 1.92-2.05 (br m, 1H), 1.71 (br d, J=13 Hz, 1H).

Aufarbeitung

  1. temperaturethe reaction mixture was gradually warmed to −5° C. over 3 hours
  2. extractionthe aqueous layer was extracted with dichloromethane
  3. washThe combined organic layers were washed with saturated aqueous sodium chloride solution
  4. dry with materialdried over magnesium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customPurification via silica gel chromatography (Gradient: 20% to 40% ethyl acetate in heptane)

Quellen und Nachweise

ORD-Eintrag
ord-60479423d6b54f09b59ed12b2369ef6f
Quelldatensatz
uspto-grants-2016_08
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US09403846B2

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