Reaktion #74490

ord-dccbd57b1b6343c194f85b8bf62d9678

Reaktionsgleichung

N=C(Cc1cc([C@@H]2O[C@H](COCc3ccccc3)[C@@H](OCc3ccccc3)[C@H](OCc3ccccc3)[C@H]2OCc2ccccc2)ccc1Cl)NN
2-(2-Chloro-5-((2S,3S,4R,5R,6R)-3,4,5-tris(benzyloxy)-6-(benzyloxymethyl)tetrahydro-2H-pyran-2-yl)phenyl)acetimidohydrazide
N=C(Cc1cc([C@@H]2O[C@H](COCc3ccccc3)[C@@H](OCc3ccccc3)[C@H](OCc3ccccc3)[C@H]2OCc2ccccc2)ccc1Cl)NN
compound 45
N=C(Cc1cc([C@@H]2O[C@H](COCc3ccccc3)[C@@H](OCc3ccccc3)[C@H](OCc3ccccc3)[C@H]2OCc2ccccc2)ccc1Cl)NN
2-(2-Chloro-5-((2S,3S,4R,5R,6R)-3,4,5-tris(benzyloxy)-6-(benzyloxymethyl)tetrahydro-2H-pyran-2-yl)phenyl)acetimidohydrazide
O=CC=O
glyoxal
→
O=C1O[C@H](CO)[C@@H](O)[C@H](O)[C@H]1O
title compound
Ausbeute 60.0%
O=C1O[C@H](CO)[C@@H](O)[C@H](O)[C@H]1O
gluconolactone
Ausbeute 60.0%

Edukte

N=C(Cc1cc([C@@H]2O[C@H](COCc3ccccc3)[C@@H](OCc3ccccc3)[C@H](OCc3ccccc3)[C@H]2OCc2ccccc2)ccc1Cl)NN
2-(2-Chloro-5-((2S,3S,4R,5R,6R)-3,4,5-tris(benzyloxy)-6-(benzyloxymethyl)tetrahydro-2H-pyran-2-yl)phenyl)acetimidohydrazide
N=C(Cc1cc([C@@H]2O[C@H](COCc3ccccc3)[C@@H](OCc3ccccc3)[C@H](OCc3ccccc3)[C@H]2OCc2ccccc2)ccc1Cl)NN
compound 45
N=C(Cc1cc([C@@H]2O[C@H](COCc3ccccc3)[C@@H](OCc3ccccc3)[C@H](OCc3ccccc3)[C@H]2OCc2ccccc2)ccc1Cl)NN
2-(2-Chloro-5-((2S,3S,4R,5R,6R)-3,4,5-tris(benzyloxy)-6-(benzyloxymethyl)tetrahydro-2H-pyran-2-yl)phenyl)acetimidohydrazide
O=CC=O
glyoxal

Reagenzien

Keine

Lösungsmittel

CCO
EtOH

Reaktionsbedingungen

Detaillierte Bedingungen
See reaction.notes.procedure_details.

Aufarbeitung

  1. 1
    Sonstigeit was evaporated under reduced pressure
  2. 2
    Sonstigeto remove volatile compounds
  3. 3
    SonstigeThe residue was purified with silica gel (Hx/EtOAc=⅓)

Vorschrift

2-(2-Chloro-5-((2S,3S,4R,5R,6R)-3,4,5-tris(benzyloxy)-6-(benzyloxymethyl)tetrahydro-2H-pyran-2-yl)phenyl)acetimidohydrazide (compound 45, crude 1 g from step 1) in EtOH (30 ml) reacted with glyoxal (5 ml, 30% in water) at 0° C., and allowed to warm up at room temperature. After the reaction mixture was stirred for 3 hours, it was evaporated under reduced pressure to remove volatile compounds. The residue was purified with silica gel (Hx/EtOAc=⅓) to provided title compound (324 mg, 60% overall yield form intermediate 2).

Quelle

DOI: 10.6084/m9.figshare.5104873.v1Patent: US08541380B2uspto-grants-2013_09