Reaktion #53990

ord-f111c92c1d8f42b1bfcc3068d7013a61

Reaktionsgleichung

COc1ccc(Cn2c(=O)ccn([C@@H]3OC([C@H](O)[C@H](NCCCNC(=O)[C@H](CC(C)C)NC(=O)OCc4ccccc4)C(=O)OC(C)(C)C)[C@@H](O[Si](C)(C)C(C)(C)C)[C@H]3O[Si](C)(C)C(C)(C)C)c2=O)cc1
tert-butyl (5S,12S)-12-[(R)-[(3R,4R,5R)-3,4-bis{[tert-butyl(dimethyl)silyl]oxy}-5-(3-(4-methoxybenzyl)-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl)tetrahydro-2-furanyl](hydroxy)methyl]-5-isobutyl-3,6-dioxo-1-phenyl-2-oxa-4,7,11-triazatridecan-13-oate
O=[N+]([O-])[O-].O=[N+]([O-])[O-].O=[N+]([O-])[O-].O=[N+]([O-])[O-].O=[N+]([O-])[O-].[Ce+4].[NH4+]
ammonium cerium(IV) nitrate
[Cl-].[Na+]
sodium chloride
→
CC(C)C[C@H](NC(=O)OCc1ccccc1)C(=O)NCCCN[C@H](C(=O)OC(C)(C)C)[C@@H](O)C1O[C@@H](n2ccc(=O)[nH]c2=O)[C@H](O[Si](C)(C)C(C)(C)C)[C@@H]1O[Si](C)(C)C(C)(C)C
tert-butyl (5S,12S)-12-[(R)-[(3R,4R,5R)-3,4-bis{[tert-butyl(dimethyl)silyl]oxy}-5-(2,4-dioxo -3,4-dihydro-1(2H)-pyrimidinyl)tetrahydro-2-furanyl](hydroxy)methyl]-5-isobutyl-3,6-dioxo-1-phenyl-2-oxa-4,7,11-triazatridecan-13-oate
Ausbeute 25.0%

Edukte

COc1ccc(Cn2c(=O)ccn([C@@H]3OC([C@H](O)[C@H](NCCCNC(=O)[C@H](CC(C)C)NC(=O)OCc4ccccc4)C(=O)OC(C)(C)C)[C@@H](O[Si](C)(C)C(C)(C)C)[C@H]3O[Si](C)(C)C(C)(C)C)c2=O)cc1
tert-butyl (5S,12S)-12-[(R)-[(3R,4R,5R)-3,4-bis{[tert-butyl(dimethyl)silyl]oxy}-5-(3-(4-methoxybenzyl)-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl)tetrahydro-2-furanyl](hydroxy)methyl]-5-isobutyl-3,6-dioxo-1-phenyl-2-oxa-4,7,11-triazatridecan-13-oate
O=[N+]([O-])[O-].O=[N+]([O-])[O-].O=[N+]([O-])[O-].O=[N+]([O-])[O-].O=[N+]([O-])[O-].[Ce+4].[NH4+]
ammonium cerium(IV) nitrate
[Cl-].[Na+]
sodium chloride

Reagenzien

Keine

Lösungsmittel

CC#N
acetonitrile
O
water

Reaktionsbedingungen

Detaillierte Bedingungen
See reaction.notes.procedure_details.

Aufarbeitung

  1. 1
    ExtraktionThe aqueous layer was extracted with ethyl acetate (3×75 mL)
  2. 2
    WaschenThe combined extracts were washed with saturated sodium chloride
  3. 3
    Trocknendried over sodium sulfate
  4. 4
    Filtrationfiltered
  5. 5
    Einengenconcentrated in vacuo
  6. 6
    SonstigeThe resultant residue was chromatographed (flash column, silica gel, 5% methanol in methylene chloride)

Vorschrift

To a solution of tert-butyl (5S,12S)-12-[(R)-[(3R,4R,5R)-3,4-bis{[tert-butyl(dimethyl)silyl]oxy}-5-(3-(4-methoxybenzyl)-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl)tetrahydro-2-furanyl](hydroxy)methyl]-5-isobutyl-3,6-dioxo-1-phenyl-2-oxa-4,7,11-triazatridecan-13-oate (420 mg, 0.409 mmol, obtained from Example 4) in acetonitrile (20 ml) was added a solution of ammonium cerium(IV) nitrate (898 mg, 1.6 mmol) in water (4 ml). The resulting solution was stirred for 48 hours at room temperature, and saturated sodium chloride aqueous solution was added. The aqueous layer was extracted with ethyl acetate (3×75 mL). The combined extracts were washed with saturated sodium chloride, dried over sodium sulfate, filtered and concentrated in vacuo. The resultant residue was chromatographed (flash column, silica gel, 5% methanol in methylene chloride) to provide tert-butyl (5S,12S)-12-[(R)-[(3R,4R,5R)-3,4-bis{[tert-butyl(dimethyl)silyl]oxy}-5-(2,4-dioxo -3,4-dihydro-1(2H)-pyrimidinyl)tetrahydro-2-furanyl](hydroxy)methyl]-5-isobutyl-3,6-dioxo-1-phenyl-2-oxa-4,7,11-triazatridecan-13-oate (91 mg, 25%) as a pale tan amorphous solid.

Quelle

DOI: 10.6084/m9.figshare.5104873.v1Patent: US06858591B2uspto-grants-2005_02