Hydrazine hydrate (1:1) → 2-amino-7-aminomethyl-4,7-dihydro-5H-thieno[2,3-c]pyran-3-carboxylic acid tert-butyl ester

HRID 1384871Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1384871
[C:1]([O:5][C:6]([C:8]1[C:16]2[CH2:15][CH2:14][O:13][CH:12]([CH2:17][N:18]3C(=O)C4C(=CC=CC=4)C3=O)[C:11]=2[S:10][C:9]=1[NH2:29])=[O:7])([CH3:4])([CH3:3])[CH3:2].O.NN>C(O)C>[C:1]([O:5][C:6]([C:8]1[C:16]2[CH2:15][CH2:14][O:13][CH:12]([CH2:17][NH2:18])[C:11]=2[S:10][C:9]=1[NH2:29])=[O:7])([CH3:4])([CH3:2])[CH3:3]

Komponenten

4

Edukt 2

HCID 24654Hydrazine hydrate (1:1)HCID 545053682-amino-7-(1,3-dioxo-1,3-dihydro-isoindol-2-ylmethyl)-4,7-dihydro-5H-thieno[2,3-c]pyran-3-carboxylic acid tert-butyl ester

Produkt 1

HCID 695860292-amino-7-aminomethyl-4,7-dihydro-5H-thieno[2,3-c]pyran-3-carboxylic acid tert-butyl esterAusbeute 72,8 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Versuchsvorschrift

To a mixture of 2-amino-7-(1,3-dioxo-1,3-dihydro-isoindol-2-ylmethyl)-4,7-dihydro-5H-thieno[2,3-c]pyran-3-carboxylic acid tert-butyl ester (6.0 g, 0.014 mol) in ethanol (100 ml) was added hydrazine hydrate (1.4 ml, 0.028 mol). The reaction mixture was heated at reflux for 1 h, cooled and the precipitate filtered off. The filtrate was evaporated in vacuo and to the residue was added water (100 ml) and the resulting mixture was extracted with diethyl ether (2×100 ml). The combined organic extracts were washed with brine (100 ml), dried (Na2SO4), filtered and the solvent evaporated in vacuo affording 2.9 g (71%) of 2-amino-7-aminomethyl-4,7-dihydro-5H-thieno[2,3-c]pyran-3-carboxylic acid tert-butyl ester as an oil.

Aufarbeitung

  1. temperatureThe reaction mixture was heated
  2. temperatureat reflux for 1 h
  3. temperaturecooled
  4. filtrationthe precipitate filtered off
  5. customThe filtrate was evaporated in vacuo and to the residue
  6. additionwas added water (100 ml)
  7. extractionthe resulting mixture was extracted with diethyl ether (2×100 ml)
  8. washThe combined organic extracts were washed with brine (100 ml)
  9. dry with materialdried (Na2SO4)
  10. filtrationfiltered
  11. customthe solvent evaporated in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-6f83e708ca6f4184bad27c86aa939e4a
Quelldatensatz
uspto-grants-2001_07
Patentnummer
US06262044B1

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