Reaktion #8893

Reaktionsgleichung

product

5-(4-Chlorophenyl)-2-(cyanomethoxy)-6-(2,4-dichlorophenyl)-nicotinonitrile

lithium bis(trimethylsilyl)amide

THF

→

title compound

3-Amino-5-(4-chlorophenyl)-6-(2,4-dichlorophenyl)furo[2,3-b]-pyridine-2-carbonitrile

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturThe reaction mixture was warmed to room temperature
2. 2
   workup.STIRRINGstirred for an additional 15 minutes
3. 3
   SonstigeThe reaction mixture was partitioned between EtOAc and 10% NaHSO4 aqueous solution
4. 4
   WaschenThe organic layer was washed twice with saturated NaHCO3 solution, brine
5. 5
   Trocknendried (Na2SO4)
6. 6
   Filtrationfiltered
7. 7
   Einengenconcentrated in vacuo
8. 8
   SonstigePurification by MPLC (silica gel; 0% to 30% ethyl acetate-hexane gradient)

Vorschrift

A solution of the product from Step A (0.132 g; 0.319 mmol) in TB (3 mL) cooled to 0° C. was treated with 1 M solution of lithium bis(trimethylsilyl)amide in THF (701 μL; 0.701 mmol) and stirred at 0° C. under nitrogen for 15 minutes. The reaction mixture was warmed to room temperature and then stirred for an additional 15 minutes. The reaction mixture was partitioned between EtOAc and 10% NaHSO4 aqueous solution. The organic layer was washed twice with saturated NaHCO3 solution, brine, dried (Na2SO4), filtered, and concentrated in vacuo. Purification by MPLC (silica gel; 0% to 30% ethyl acetate-hexane gradient) gave the title compound. HPLC/MS: 413.9 (M+1), 415.9 (M+3); Rt=4.50 min.

Quelle