Cesium carbonate → (2S,3S)-1-tert-Butyloxycarbonyl-3-(tert-butyldimethylsilanyloxy)-2-[(1R)-1-(3-chloro-4-cyano-2-methylphenylamino)ethyl]pyrrolidine

HRID 751169Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 751169
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][C@H:10]([O:13][Si:14]([C:17]([CH3:20])([CH3:19])[CH3:18])([CH3:16])[CH3:15])[C@@H:9]1[C@H:21]([NH2:23])[CH3:22])=[O:7])([CH3:4])([CH3:3])[CH3:2].[Cl:24][C:25]1[C:32]([CH3:33])=[C:31](I)[CH:30]=[CH:29][C:26]=1[C:27]#[N:28].C([O-])([O-])=O.[Cs+].[Cs+]>C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].C[C@H](N(C)C)C1[CH-]C=CC=1P(C1C=CC=CC=1)C1C=CC=CC=1.[CH-]1C=CC=C1.[Fe+2].C1(C)C=CC=CC=1>[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][C@H:10]([O:13][Si:14]([C:17]([CH3:20])([CH3:19])[CH3:18])([CH3:16])[CH3:15])[C@@H:9]1[C@H:21]([NH:23][C:31]1[CH:30]=[CH:29][C:26]([C:27]#[N:28])=[C:25]([Cl:24])[C:32]=1[CH3:33])[CH3:22])=[O:7])([CH3:4])([CH3:3])[CH3:2]

Komponenten

7

Edukt 3

HCID 10796Cesium carbonateHCID 167319952-Chloro-4-iodo-3-methylbenzonitrileHCID 68457944(2S,3S)-N-tert-Butyloxycarbonyl-3-(tert-butyldimethylsilanyloxy)-2-((1R)-1-aminoethyl)pyrrolidine

Produkt 1

HCID 68459554(2S,3S)-1-tert-Butyloxycarbonyl-3-(tert-butyldimethylsilanyloxy)-2-[(1R)-1-(3-chloro-4-cyano-2-methylphenylamino)ethyl]pyrrolidineAusbeute 18,2 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 9811564Bis(dibenzylideneacetone)palladiumKatalysatorHCID 44630263(S)-(R)-PpfaKatalysatorHCID 1140TolueneLösungsmittel

Reaktionsbedingungen

Temperatur
140 °C

Versuchsvorschrift

To a solution of 80D (137 mg, 0.40 mmol) in nitrogen degassed toluene (3 mL) at rt was added 2-chloro-4-iodo-3-methyl-benzonitrile (122 mg, 0.44 mmol), Cs2CO3 (260 mg, 0.80 mmol) and Pd2(dba)3 (7.3 mg, 0.008 mmol) and (S)-N,N-dimethyl-1-[(R)-2-(diphenyphosphino)ferrocenyl]ethylamine (11 mg, 0.024 mmol). The reaction was degassed with nitrogen for 30 min, sealed and heated at 140° C. for 2 h under microwave conditions. The mixture was cool to rt, diluted with hexane and filtered through a layer of celite. The filtrate was evaporated to give the crude product. Purification by flash chromatography (10 g ISCO silica gel cartridge, 0-20% EtOAc in hexane gradient) gave the title compound 80E (36 mg): MS (ES) m/z 345 [M+H]+; HRMS calcd for C25H41N3O3ClSi 494.2606, found 494.2606.

Aufarbeitung

  1. customThe reaction was degassed with nitrogen for 30 min
  2. customsealed
  3. temperatureThe mixture was cool to rt
  4. additiondiluted with hexane
  5. filtrationfiltered through a layer of celite
  6. customThe filtrate was evaporated
  7. customto give the crude product
  8. customPurification by flash chromatography (10 g ISCO silica gel cartridge, 0-20% EtOAc in hexane gradient)

Quellen und Nachweise

ORD-Eintrag
ord-d8513e16568e410f9958a900f9e5264a
Quelldatensatz
uspto-grants-2008_07
Patentnummer
US07405234B2

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