Methyl 4-[5-(2-cyclopentylacetamido)-1-ethylindol-3-ylmethyl]-3-methoxybenzoate → (+/-)Methyl 4-[5-(2-cyclopentylacetamido)-1-ethyl-2,3-dihydroindol-3-ylmethyl]-3-methoxybenzoate

HRID 1742324Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1742324
[CH:1]1([CH2:6][C:7]([NH:9][C:10]2[CH:11]=[C:12]3[C:16](=[CH:17][CH:18]=2)[N:15]([CH2:19][CH3:20])[CH:14]=[C:13]3[CH2:21][C:22]2[CH:31]=[CH:30][C:25]([C:26]([O:28][CH3:29])=[O:27])=[CH:24][C:23]=2[O:32][CH3:33])=[O:8])[CH2:5][CH2:4][CH2:3][CH2:2]1>[Pd].C(O)=O>[CH:1]1([CH2:6][C:7]([NH:9][C:10]2[CH:11]=[C:12]3[C:16](=[CH:17][CH:18]=2)[N:15]([CH2:19][CH3:20])[CH2:14][CH:13]3[CH2:21][C:22]2[CH:31]=[CH:30][C:25]([C:26]([O:28][CH3:29])=[O:27])=[CH:24][C:23]=2[O:32][CH3:33])=[O:8])[CH2:2][CH2:3][CH2:4][CH2:5]1

Komponenten

4

Edukt 1

HCID 14626833Methyl 4-[5-(2-cyclopentylacetamido)-1-ethylindol-3-ylmethyl]-3-methoxybenzoate

Produkt 1

HCID 14626834(+/-)Methyl 4-[5-(2-cyclopentylacetamido)-1-ethyl-2,3-dihydroindol-3-ylmethyl]-3-methoxybenzoateAusbeute 80 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 23938PalladiumKatalysatorHCID 284Formic AcidLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

Palladium-on-carbon (10% w/w, 0.5 g.) was added to a mixture of methyl 4-[5-(2-cyclopentylacetamido)-1-ethylindol-3-ylmethyl]-3-methoxybenzoate (0.5 g., prepared as described in Example 80), and formic acid (99%, 20 ml.), under an atmosphere of nitrogen. The mixture was vigorously stirred and heated at 80° C. for one hour. The cooled mixture was filtered through a pad of diatomaceous earth, the filter cake washed with methanol, and the filtrate evaporated. The resulting oil was dissolved in ethyl acetate (30 ml.) washed with water, brine, then dried (MgSO4) and evaporated. The product was purified by flash chromatography on silica gel (4 cm. diameter column), eluting with 2:3 v/v ethyl acetate:hexane, to give the title compound (0.37 g., 80%) as a foam; NMR (250 MHz, DMSO--d6): 1.04(t,3H, --CH2CH3); 1.15(m,2H, cyclopentyl ring); 1.4-1.8(m,6H, cyclopentyl ring); 2.2(m,3H); 2.7(dd,1H); 2.85-3.2(m,5H); 3.45(m,1H); 3.86(s,3H, OCH3); 3.87(s,3H, OCH3); 6.43(d,1H); 7.20 (m,2H); 7.30(d,1H); 7.50(m,2H); 9.47(s,1H, NH).

Aufarbeitung

  1. filtrationThe cooled mixture was filtered through a pad of diatomaceous earth
  2. washthe filter cake washed with methanol
  3. customthe filtrate evaporated
  4. dissolutionThe resulting oil was dissolved in ethyl acetate (30 ml.)
  5. washwashed with water, brine
  6. dry with materialdried (MgSO4)
  7. customevaporated
  8. customThe product was purified by flash chromatography on silica gel (4 cm. diameter column)
  9. washeluting with 2:3 v/v ethyl acetate

Quellen und Nachweise

ORD-Eintrag
ord-f2685bac8a474eaba8cc5121ee22fd18
Quelldatensatz
uspto-grants-1994_08
Patentnummer
US05338734

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