Reaktion #634162

Reaktionsgleichung

2-(4-{1-ethyl-1-[3-methyl-4-(1-trimethylsilanyloxy-cyclohexylethynyl)-phenyl]-propyl}-2-methyl-phenyl)-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane

(5-bromo-pyridin-3-yl)acetic acid methyl ester

potassium phosphate

→

title compound

Ausbeute 62.6%

[5-(4-{1-ethyl-1-[3-methyl-4-(1-trimethylsilanyloxy-cyclohexylethynyl)-phenyl]-propyl}-2-methyl-phenyl)-pyridin-3-yl]-acetic Acid Methyl Ester

Ausbeute 62.6%

Lösungsmittel

N,N-dimethylformamide

Reaktionsbedingungen

Aufarbeitung

1. 1
   FiltrationThe reaction mixture was filtered through cotton plug
2. 2
   Sonstigethe mixture was purified by silica gel chromatography (45% ethyl acetate/hexane)

Vorschrift

A solution of 2-(4-{1-ethyl-1-[3-methyl-4-(1-trimethylsilanyloxy-cyclohexylethynyl)-phenyl]-propyl}-2-methyl-phenyl)-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane (Example 35-(4); 57.6 mg, 0.10 mmol), (5-bromo-pyridin-3-yl)acetic acid methyl ester (Example 24-(2); 30.1 mg, 0.13 mmol), tetrakistriphenylphosphine palladium (14.1 mg, 0.0122 mmol) and potassium phosphate (27.8 mg, 0.13 mmol) in N,N-dimethylformamide (0.27 mL) was stirred with microwave heating at 140° C. for 10 minutes. The reaction mixture was filtered through cotton plug, and the mixture was purified by silica gel chromatography (45% ethyl acetate/hexane) to give the title compound (37.3 mg, 62%).

Quelle