Dimethylacetamide → tert-Butyl 5-(tert-butyldiphenylsilanyloxy)-3-{4-cyclopropyl-5-[3-(2-ethylbutyl)cyclobutyl]isoxazol-3-yl}valerate

HRID 1912097Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1912097
[Si:1]([O:18][CH2:19][CH2:20][CH:21]([C:30]1[C:34](I)=[C:33]([CH:36]2[CH2:39][CH:38]([CH2:40][CH:41]([CH2:44][CH3:45])[CH2:42][CH3:43])[CH2:37]2)[O:32][N:31]=1)[CH2:22][C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])([C:14]([CH3:17])([CH3:16])[CH3:15])([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH:46]1(B2OC(C)(C)C(C)(C)O2)[CH2:48][CH2:47]1.P([O-])([O-])([O-])=O.[K+].[K+].[K+].CN(C)C(=O)C>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.C(OCC)(=O)C>[Si:1]([O:18][CH2:19][CH2:20][CH:21]([C:30]1[C:34]([CH:46]2[CH2:48][CH2:47]2)=[C:33]([CH:36]2[CH2:39][CH:38]([CH2:40][CH:41]([CH2:44][CH3:45])[CH2:42][CH3:43])[CH2:37]2)[O:32][N:31]=1)[CH2:22][C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])([C:14]([CH3:17])([CH3:16])[CH3:15])([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Komponenten

7

Edukt 4

HCID 31374DimethylacetamideHCID 62657Potassium Phosphate, TribasicHCID 27580152-Cyclopropyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolaneHCID 71127336tert-Butyl 5-(tert-butyldiphenylsilanyloxy)-3-{5-[3-(2-ethylbutyl)cyclobutyl]-4-iodoisoxazol-3-yl}valerate

Produkt 1

HCID 71114789tert-Butyl 5-(tert-butyldiphenylsilanyloxy)-3-{4-cyclopropyl-5-[3-(2-ethylbutyl)cyclobutyl]isoxazol-3-yl}valerateAusbeute 65,2 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418476HCID 178418476, VerbindungKatalysatorHCID 8857Ethyl AcetateLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

tert-Butyl 5-(tert-butyldiphenylsilanyloxy)-3-{5-[3-(2-ethylbutyl)cyclobutyl]-4-iodoisoxazol-3-yl}valerate (4.96 g), 2-cyclopropyl-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane (1.68 g), tripotassium phosphate (5.66 g), PdCl2(PPh3)2 (468 mg) and N,N-dimethylacetamide (50 mL) were mixed. The mixture was stirred at 80° C. for 5 hr. To the reaction mixture were added ethyl acetate (50 mL) and Celite at RT, and the mixture was filtered. The collected solid was washed with ethyl acetate (50 mL×2). The filtrate was washed with water/brine=1/1 (100 mL×2) and brine (50 mL), then dried over sodium sulfate. The sodium sulfate was filtered off and the filtrate was concentrated in vacuo. The resultant residue was purified by silica gel column chromatography (Eluent: ethyl acetate/hexane=1/50→1/40→1/30→1/20) to give the title compound (2.86 g).

Aufarbeitung

  1. filtrationthe mixture was filtered
  2. washThe collected solid was washed with ethyl acetate (50 mL×2)
  3. washThe filtrate was washed with water/brine=1/1 (100 mL×2) and brine (50 mL)
  4. dry with materialdried over sodium sulfate
  5. filtrationThe sodium sulfate was filtered off
  6. concentrationthe filtrate was concentrated in vacuo
  7. customThe resultant residue was purified by silica gel column chromatography (Eluent: ethyl acetate/hexane=1/50→1/40→1/30→1/20)

Quellen und Nachweise

ORD-Eintrag
ord-d091e1c03ff343e4a1fee1fbf3293487
Quelldatensatz
uspto-grants-2013_12
Patentnummer
US08604069B2

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