Acetic Acid → Benzo[1,3]dioxol-5-ylmethyl-(1h-benzoimidazol-2-ylmethyl)-(5,6,7,8-tetrahydro-quinolin-8-yl)-amine

HRID 1582299

Reaktionsgleichung

Reaktionsgleichung von HRID 1582299
C(OC([N:8]1[C:12]2[CH:13]=[CH:14][CH:15]=[CH:16][C:11]=2[N:10]=[C:9]1[CH2:17][NH:18][CH:19]1[C:28]2[N:27]=[CH:26][CH:25]=[CH:24][C:23]=2[CH2:22][CH2:21][CH2:20]1)=O)(C)(C)C.[CH:29]1[C:34]([CH:35]=O)=[CH:33][C:32]2[O:37][CH2:38][O:39][C:31]=2[CH:30]=1.CC(O)=O.[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+]>C1COCC1.C(Cl)Cl.FC(F)(F)C(O)=O>[O:39]1[C:31]2[CH:30]=[CH:29][C:34]([CH2:35][N:18]([CH2:17][C:9]3[NH:8][C:12]4[CH:13]=[CH:14][CH:15]=[CH:16][C:11]=4[N:10]=3)[CH:19]3[C:28]4[N:27]=[CH:26][CH:25]=[CH:24][C:23]=4[CH2:22][CH2:21][CH2:20]3)=[CH:33][C:32]=2[O:37][CH2:38]1

Komponenten

8

Edukt 4

HCID 176Acetic AcidHCID 8438PiperonalHCID 5049666Sodium triacetoxyborohydrideHCID 219850812-[(5,6,7,8-Tetrahydroquinolin-8-ylamino)-methyl]-benzimidazole-1-carboxylic acid tert-butyl ester

Produkt 1

HCID 21985019Benzo[1,3]dioxol-5-ylmethyl-(1h-benzoimidazol-2-ylmethyl)-(5,6,7,8-tetrahydro-quinolin-8-yl)-amineAusbeute 33,1 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 6344DichloromethaneLösungsmittelHCID 6422Trifluoroacetic acidLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

Using General Procedure B: To a solution of [1-(tert-butoxycarbonyl)-(1H-benzimidazol-2-ylmethyl)]-(5,6,7,8-tetrahydro-quinolin-8-yl)-amine (125 mg, 0.33 mmol), piperonal (50 mg, 0.33 mmol) and AcOH (0.02 mL, 0.33 mmol) in THF (3.3 mL) was added NaBH(OAc)3 (210 mg, 0.99 mmol) and the resultant suspension stirred at room temperature for 16 h. The crude product was dissolved in a mixture of CH2Cl2 (˜2 mL) and trifluoroacetic acid (˜2 mL). After 1.5 h, the reaction mixture was concentrated, redissolved in H2O (˜2 mL), and basified with 1N NaOH. The aqueous solution was extracted with CH2C12 (3×50 mL) and the combined organic extracts were dried over MgSO4 and concentrated to a yellow syrup. The product was purified by column chromatography on silica gel (100:1:1—EtOAc:MeOH:NH4OH) to give the titled compound as a white foam (45 mg, 33%). 1H NMR (300 MHz, CDCl3) δ8.69 (d, 1H, J=3.3 Hz), 7.58 (br s, 2H), 7.43 (d, 1H, J=7.2 Hz), 7.21-7.16 (m, 3H), 6.99 (d, 1H, J=1.5 Hz), 6.79 (dd, 1H, J=8.1, 1.5 Hz), 6.65 (d, 1H, J=7.8 Hz), 5.86-5.85 (m, 2H), 4.15 (d, 1H, J=16.5 Hz), 4.09-4.06 (m, 1H), 3.98 (d, 1H, J=16.8 Hz), 3.64 (s, 2H), 2.91-2.80 (m, 1H), 2.74-2.67 (m, 1H), 2.27-2.17 (m, 1H), 2.06-1.64 (m, 2H), 1.75-1.64 (m, 1H), (m, 1H); 13C NMR (75.5 MHz, CDCl3) δ159.2, 158.0, 149.4, 148.7, 148.5, 139.0, 136.5, 135.0, 124.0, 123.5, 123.3, 110.7, 109.5, 102.5, 61.8, 55.5, 49.9, 31.0, 25.0, 23.1. ES-MS m/z 413.3 (M+H). Anal Calcd for (C25H24N4O2).0.8(H2O): C, 70.34; H, 6.04; N, 13.12. Found: C, 70.29; H, 5.99; N, 12.75.

Aufarbeitung

  1. concentrationthe reaction mixture was concentrated
  2. dissolutionredissolved in H2O (˜2 mL)
  3. extractionThe aqueous solution was extracted with CH2C12 (3×50 mL)
  4. dry with materialthe combined organic extracts were dried over MgSO4
  5. concentrationconcentrated to a yellow syrup
  6. customThe product was purified by column chromatography on silica gel (100:1:1—EtOAc:MeOH:NH4OH)

Quellen und Nachweise

ORD-Eintrag
ord-cd0baa46adca472c8d5d0f050d342e64
Quelldatensatz
uspto-grants-2004_05
Patentnummer
US06734191B2

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