Reaktion #1591939

Reaktionsgleichung

sodium hydroxide

tert-butyl [(1S,2R)-2-({5-[(5-bromo-6-methylpyridin-2-yl)amino]-6-cyanopyridin-3-yl}amino)cyclohexyl]carbamate

Dioxane

2-di-tert-butylphosphino-3,4,5,6-tetramethyl-2′,4′,6′-tri-isopropylbiphenyl

→

tert-butyl [(1S,2R)-2-({6-carbamoyl-5-[(5-hydroxy-6-methylpyridin-2-yl)amino]pyridin-3-yl}amino)cyclohexyl]carbamate

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe vial was purged
2. 2
   workup.ADDITIONwere added
3. 3
   SonstigeThe vial was purged
4. 4
   Sonstigeflushed three times with argon before the vial
5. 5
   Sonstigewas sealed
6. 6
   Temperaturthe reaction was cooled to room temperature
7. 7
   Filtrationfiltered through CELITE (washed with dichloromethane)
8. 8
   workup.ADDITIONdiluted with water
9. 9
   TrocknenThe organic layer was dried over sodium sulfate
10. 10
    Filtrationfiltered
11. 11
    Einengenconcentrated under reduced pressure
12. 12
    SonstigeThe residue was purified by silica gel chromatography (0-100% acetone/hexanes, linear gradient)

Vorschrift

This example describes the conversion of (B9) to (C11) shown in Scheme 2. Dioxane (2.40 mL) and sodium hydroxide (4.0 N in water, 0.36 mL, 1.4 mmol) were added to tert-butyl [(1S,2R)-2-({5-[(5-bromo-6-methylpyridin-2-yl)amino]-6-cyanopyridin-3-yl}amino)cyclohexyl]carbamate (PrepEx 1.6) (0.241 g, 0.481 mmol) in a scintillation vial. The vial was purged and flushed with argon three times before Pd2(dba)3 (0.013 g, 0.014 mmol) and 2-di-tert-butylphosphino-3,4,5,6-tetramethyl-2′,4′,6′-tri-isopropylbiphenyl (0.028 g, 0.058 mmol) were added. The vial was purged and flushed three times with argon before the vial was sealed and heated to 80° C. After 4 hours, the reaction was cooled to room temperature, filtered through CELITE (washed with dichloromethane) and diluted with water. The organic layer was dried over sodium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by silica gel chromatography (0-100% acetone/hexanes, linear gradient) to afford tert-butyl [(1S,2R)-2-({6-carbamoyl-5-[(5-hydroxy-6-methylpyridin-2-yl)amino]pyridin-3-yl}amino)cyclohexyl]carbamate. MS ESI calc'd. for C23H33N6O4 [M+H]+ 457. found 457.

Quelle