Trifluoroacetic acid → N-methyl-1-(5-(thiophen-2-yl)tetrazolo[1,5-a]pyrazin-8-yl)azetidin-3-amine

HRID 535712Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 535712
[CH3:1][N:2]([CH:10]1[CH2:13][N:12]([C:14]2[C:15]3[N:16]([N:25]=[N:26][N:27]=3)[C:17]([C:20]3[S:21][CH:22]=[CH:23][CH:24]=3)=[CH:18][N:19]=2)[CH2:11]1)C(=O)OC(C)(C)C.FC(F)(F)C(O)=O>ClCCl>[CH3:1][NH:2][CH:10]1[CH2:11][N:12]([C:14]2[C:15]3[N:16]([N:25]=[N:26][N:27]=3)[C:17]([C:20]3[S:21][CH:22]=[CH:23][CH:24]=3)=[CH:18][N:19]=2)[CH2:13]1

Komponenten

4

Edukt 2

HCID 6422Trifluoroacetic acidHCID 58447026tert-Butyl methyl(1-(5-(thiophen-2-yl)tetrazolo[1,5-a]pyrazin-8-yl)azetidin-3-yl)carbamate

Produkt 1

HCID 53391272N-methyl-1-(5-(thiophen-2-yl)tetrazolo[1,5-a]pyrazin-8-yl)azetidin-3-amineAusbeute 73 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

A 2 L round bottom flask was charged with tert-butyl methyl(1-(5-(thiophen-2-yl)tetrazolo[1,5-a]pyrazin-8-yl)azetidin-3-yl)carbamate (50 g, 0.13 mol) and dichloromethane (500 mL). To the solution was added trifluoroacetic acid (100 mL). The resulting slurry was stirred at room temperature for 2.5 h. Work-up: the reaction mixture was concentrated in vacuo. The residue was suspended in water (500 L) and treated with solid Na2CO3 (pH 10˜11, there was un-dissolved Na2CO3 remaining). The solid was collected by filtration, re-suspended in water (500 mL×2) with stirring to remove Na2CO3. It was further washed with EtOH (500 mL), and dried to afford 27 g (73%) of the product as a yellow solid. 1H NMR (400 MHz, DMSO-d6) δ: 8.19 (s, 1H), 7.96 (dd, J=4.0, 0.8 Hz, 1H), 7.76 (dd, J=4.8, 0.8 Hz, 1H), 7.27 (dd, J=4.8, 4.0 Hz, 1H), 4.60 (br, 2H), 4.18 (br, 2H), 3.73 (m, 1H), 2.43 (br, 1H), 2.29 (s, 3H). MS m/z: 288 (M+H+).

Aufarbeitung

  1. concentrationthe reaction mixture was concentrated in vacuo
  2. additiontreated with solid Na2CO3 (pH 10˜11, there was un-dissolved Na2CO3 remaining)
  3. filtrationThe solid was collected by filtration
  4. stirringwith stirring
  5. customto remove Na2CO3
  6. washIt was further washed with EtOH (500 mL)
  7. customdried

Quellen und Nachweise

ORD-Eintrag
ord-1a946c4617034e9fa866346c4c3dc309
Quelldatensatz
uspto-grants-2014_10
Patentnummer
US08859550B2

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