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Ammonia → (2R,4R)-1-tert-butyl 2-methyl 4-(3-(4-cyanophenyl)ureido)piperidine-1,2-dicarboxylate

HRID 1971306
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1971306
[N:1]([C:4]1[CH:11]=[CH:10][C:7]([C:8]#[N:9])=[CH:6][CH:5]=1)=[C:2]=[O:3].[NH2:12][C@@H:13]1[CH2:18][CH2:17][N:16]([C:19]([O:21][C:22]([CH3:25])([CH3:24])[CH3:23])=[O:20])[C@@H:15]([C:26]([O:28][CH3:29])=[O:27])[CH2:14]1.CCN(CC)CC.N>C1COCC1.CO>[C:8]([C:7]1[CH:10]=[CH:11][C:4]([NH:1][C:2](=[O:3])[NH:12][C@@H:13]2[CH2:18][CH2:17][N:16]([C:19]([O:21][C:22]([CH3:23])([CH3:24])[CH3:25])=[O:20])[C@@H:15]([C:26]([O:28][CH3:29])=[O:27])[CH2:14]2)=[CH:5][CH:6]=1)#[N:9]
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Komponenten

7

Edukt 4

HCID 222AmmoniaHCID 8471TriethylamineHCID 1703804-Cyanophenyl isocyanateHCID 54209755(2R,4R)-1-tert-butyl 2-methyl 4-aminopiperidine-1,2-dicarboxylate

Produkt 1

HCID 57539094(2R,4R)-1-tert-butyl 2-methyl 4-(3-(4-cyanophenyl)ureido)piperidine-1,2-dicarboxylateAusbeute 93,6 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 887MethanolLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

4-isocyanatobenzonitrile (1.17 g, 8.13 mmol) was added to a solution of (2R,4R)-1-tert-butyl 2-methyl 4-aminopiperidine-1,2-dicarboxylate (2.0 g, 7.7 mmol) and NEt3 (1.3 mL, 9.3 mmol) in THF (30 mL), and the resulting solution was stirred at room temperature for 6 hours. 1M ammonia in methanol (5 mL) was added to reaction mixture to quench excess isocyanine. Water (100 mL) and ethyl acetate (200 mL) were added to the mixture. The organic layer was separated and dried over MgSO4 and concentrated to give a solid. Purification was done by Companion (ReadySep, 80 g, silica gel packed) with ethyl acetate/heptane from 40-70% to give the urea as a white solid 2.9 g (90%). LC-MS: 403.2, 401.3 (t=2.6 min).

Aufarbeitung

  1. customto quench excess isocyanine
  2. additionWater (100 mL) and ethyl acetate (200 mL) were added to the mixture
  3. customThe organic layer was separated
  4. dry with materialdried over MgSO4
  5. concentrationconcentrated
  6. customto give a solid
  7. customPurification

Quellen und Nachweise

ORD-Eintrag
ord-163c62e754a840b18e03e0c89bcee111
Quelldatensatz
uspto-grants-2013_04
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08431597B2

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