반응 #425752

반응 방정식

potassium carbonate

4-Chloro-3-methylpyridine

3-(tert-butoxycarbonyl)phenylboronic acid

→

product

수율 71.4%

tert-butyl 3-(3-methylpyridin-4-yl)benzoate

수율 71.4%

용매

1,2-dimethoxyethane

반응 조건

후처리

1. 1
   기타The crude reaction mixture
2. 2
   온도was cooled to room temperature
3. 3
   기타the layers were separated
4. 4
   기타The organic layer was evaporated to dryness
5. 5
   기타purified on 120 g of silica gel utilizing a gradient of 0-70% ethyl acetate in hexanes

실험 절차

4-Chloro-3-methylpyridine (2.00 g, 15.7 mmol), 3-(tert-butoxycarbonyl)phenylboronic acid (5.42 g, 24.4 mmol), a 2M aqueous solution of potassium carbonate (31.4 mL, 62.8 mmol), and palladium tetrakis(triphenylphosphine) (Pd(PPh3)4, 0.906 g, 0.784 mmol) were suspended in 1,2-dimethoxyethane (DME, 150 mL). The resulting mixture was stirred and heated to 80° C. for 60 hours. The crude reaction mixture was cooled to room temperature and then the layers were separated. The organic layer was evaporated to dryness and then purified on 120 g of silica gel utilizing a gradient of 0-70% ethyl acetate in hexanes to yield the pure product as a pale yellow oil (3.02 g, 11.2 mmol, 71.4%).

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