Reaktion #1933987

Reaktionsgleichung

2-(3,6-dihydro-2H-pyran-4-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane

N-(trans-4-(3-chloropyrazin-2-yloxy)cyclohexyl)benzo[d]thiazol-2-amine

sodium carbonate

→

N-(trans-4-(3-(3,6-dihydro-2H-pyran-4-yl)pyrazin-2-yloxy)cyclohexyl)benzo[d]thiazol-2-amine

Ausbeute 83.0%

Lösungsmittel

1,2-dimethoxyethane

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturAfter 4 h the mixture was cooled to RT
2. 2
   Sonstigepartitioned between ethyl acetate and water
3. 3
   SonstigeThe layers were separated
4. 4
   Extraktionthe aqueous layer was extracted with ethyl acetate twice
5. 5
   TrocknenThe combined extracts were dried over anhydrous magnesium sulfate
6. 6
   Filtrationfiltered
7. 7
   Einengenconcentrated in vacuo
8. 8
   SonstigeThe resulting oil was purified by silica gel chromatography

Vorschrift

A mixture of 2-(3,6-dihydro-2H-pyran-4-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (0.10 g, 0.49 mmol) and N-(trans-4-(3-chloropyrazin-2-yloxy)cyclohexyl)benzo[d]thiazol-2-amine (0.14 g, 0.39 mmol), prepared as in step 1 of example 9a, in 1,2-dimethoxyethane (2 mL) and aqueous sodium carbonate (2 M, 0.58 mL, 1.16 mmol) was placed under nitrogen atmosphere using 3 evacuation/backfill cycles. Tetrakis triphenylphosphine(palladium) (0.022 g, 0.019 mmol) was added and one more evacuation/backfill cycle was executed. The mixture was then heated to 80° C. After 4 h the mixture was cooled to RT and partitioned between ethyl acetate and water. The layers were separated and the aqueous layer was extracted with ethyl acetate twice. The combined extracts were dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo. The resulting oil was purified by silica gel chromatography to give N-(trans-4-(3-(3,6-dihydro-2H-pyran-4-yl)pyrazin-2-yloxy)cyclohexyl)benzo[d]thiazol-2-amine (0.13 g, 0.32 mmol, 83% yield). [M+1] 409.2. IC50 (uM): 0.03702.

Quelle