Phosphoric Acid → (S)-benzyl 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-amino-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl)cyclohex-3-enecarboxylate

HRID 1400992Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1400992
FC(F)(F)S(O[C:7]1[C:8]([CH3:36])([CH3:35])[C@H:9]2[C@:22]([CH3:25])([CH2:23][CH:24]=1)[C@@H:21]1[C@:12]([CH3:34])([C@@:13]3([CH3:33])[C@H:18]([CH2:19][CH2:20]1)[C@H:17]1[C@H:26]([C:29]([CH3:31])=[CH2:30])[CH2:27][CH2:28][C@:16]1([NH2:32])[CH2:15][CH2:14]3)[CH2:11][CH2:10]2)(=O)=O.P(=O)(O)(O)O.[K].CC1(C)C(C)(C)OB([C:53]2[CH2:58][CH2:57][C@H:56]([C:59]([O:61][CH2:62][C:63]3[CH:68]=[CH:67][CH:66]=[CH:65][CH:64]=3)=[O:60])[CH2:55][CH:54]=2)O1.C1(P(C2CCCCC2)C2C=CC=CC=2C2C(OC)=CC=CC=2OC)CCCCC1>O1CCOCC1.O.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[NH2:32][C@:16]12[CH2:28][CH2:27][C@@H:26]([C:29]([CH3:31])=[CH2:30])[C@@H:17]1[C@@H:18]1[C@@:13]([CH3:33])([CH2:14][CH2:15]2)[C@@:12]2([CH3:34])[C@@H:21]([C@:22]3([CH3:25])[C@@H:9]([CH2:10][CH2:11]2)[C:8]([CH3:35])([CH3:36])[C:7]([C:53]2[CH2:58][CH2:57][C@H:56]([C:59]([O:61][CH2:62][C:63]4[CH:64]=[CH:65][CH:66]=[CH:67][CH:68]=4)=[O:60])[CH2:55][CH:54]=2)=[CH:24][CH2:23]3)[CH2:20][CH2:19]1

Komponenten

9

Edukt 5

HCID 1004Phosphoric AcidHCID 5462222PotassiumHCID 112698722-Dicyclohexylphosphino-2',6'-dimethoxybiphenylHCID 71698571(1R,3aS,5aR,5bR,7aR,11aR,11bR,13aR,13bR)-3a-amino-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl trifluoromethanesulfonateHCID 86692349(S)-benzyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)cyclohex-3-enecarboxylate

Produkt 1

HCID 86692348(S)-benzyl 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-amino-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl)cyclohex-3-enecarboxylateAusbeute 75 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 167845palladium(II) acetateKatalysatorHCID 962WaterLösungsmittelHCID 312751,4-DioxaneLösungsmittel

Reaktionsbedingungen

Temperatur
75 °C

Versuchsvorschrift

To a vial containing (1R,3aS,5aR,5bR,7aR,11aR,11bR,13aR,13bR)-3a-amino-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl trifluoromethanesulfonate (0.05 g, 0.090 mmol) was added phosphoric acid, potassium salt (0.057 g, 0.269 mmol), (S)-benzyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)cyclohex-3-enecarboxylate (0.062 g, 0.181 mmol) (enantiomer 2 prepared above), 2-dicyclohexylphosphino-2′,6′-dimethoxy-1,1′-biphenyl (S-phos) (5.52 mg, 0.013 mmol), and palladium(II) acetate (2.013 mg, 8.96 mmol). The mixture was diluted with 1,4-dioxane (1 mL) and water (0.1 mL), was flushed with nitrogen, then was sealed and heated to 75° C. After 6 h of heating, the mixture was cooled to rt, was diluted with dichloromethane, and was dried with sodium sulfate. The drying agent was removed by filtration and the filtrate was concentrated under reduced pressure. The residue was purified by flash chromatography using a 10-60% ethyl acetate in hexanes gradient and a 12 g silica gel column. The fractions containing the expected product were combined and concentrated under reduced pressure to give (S)-benzyl 4-((1R,3 aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-amino-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl)cyclohex-3-enecarboxylate (0.042 g, 0.067 mmol, 75% yield) as an off-white solid. 1H NMR (500 MHz, chloroform-d) δ=7.42-7.31 (m, 5H), 5.37 (br. s., 1H), 5.21-5.17 (m, 1H), 5.16 (s, 2H), 4.75 (d, J=1.9 Hz, 1H), 4.62 (s, 1H), 2.65-2.52 (m, 2H), 2.39-2.32 (m, 2H), 2.22-2.15 (m, 2H), 2.10-1.96 (m, 3H), 1.71 (s, 3H), 1.09 (s, 3H), 0.98 (s, 6H), 0.91 (s, 3H), 0.88 (s, 3H), 1.82-0.83 (m, 23H).

Aufarbeitung

  1. customwas flushed with nitrogen
  2. customwas sealed
  3. temperatureAfter 6 h of heating
  4. temperaturethe mixture was cooled to rt
  5. additionwas diluted with dichloromethane
  6. dry with materialwas dried with sodium sulfate
  7. customThe drying agent was removed by filtration
  8. concentrationthe filtrate was concentrated under reduced pressure
  9. customThe residue was purified by flash chromatography
  10. additionThe fractions containing the expected product
  11. concentrationconcentrated under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-7dcb264fe0d549128f9f0c814a8c7f2e
Quelldatensatz
uspto-grants-2014_12
Patentnummer
US08906889B2

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