Reaktion #418096

Reaktionsgleichung

(2S,5R)-6-(benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carboxylic acid

tert-butyl [2-(aminooxy)ethyl]carbamate

1-hydroxybenzotriazole

1-ethyl-(3-dimethylamino propyl)carbodiimide hydrochloride

→

42

Ausbeute 89.0%

tert-Butyl {2-[({[(2S,5R)-6-(benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]oct-2-yl]carbonyl}amino)oxy]ethyl}carbamate

Ausbeute 89.0%

Lösungsmittel

DCM

DCM

Reaktionsbedingungen

Aufarbeitung

1. 1
   Einengenconcentrated
2. 2
   Sonstigeto provide a residue which

Vorschrift

To a mixture of (2S,5R)-6-(benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carboxylic acid 1 (0.150 g, 0.543 mmol, US 2005/20572 A1) in DCM (4.0 mL) was added tert-butyl [2-(aminooxy)ethyl]carbamate 41 (0.143 g, 0.814 mmol, US 2005/54701 A1), 1-hydroxybenzotriazole (0.110 g, 0.814 mmol), 1-ethyl-(3-dimethylamino propyl)carbodiimide hydrochloride (0.156 g, 0.814 mmol) and DMAP (0.100 g, 0.814 mmol) sequentially at room temperature. The mixture was stirred at room temperature overnight, diluted with DCM and concentrated to provide a residue which was subjected to chromatography to give 42 (0.21 g, 89%) as a white foam.

Quelle