Potassium Phosphate, Tribasic → 1-{2-(2-Methyl-4-(3,4,5-trimethyl-pyrazol-1-yl)-phenoxymethyl)-3-trimethylsilylethynyl-phenyl}-4-methyl-1,4-dihydrotetrazole-5-one

Participants

Reaction Conditions

Reaction Steps

A mixture of 1-{3-bromo-2-[2-methyl-4-(3,4,5-trimethyl-pyrazol-1-yl)-phenoxymethyl]-phenyl}-4-methyl-1,4-dihydrotetrazole-5-one (described in Reference Preparation example 70) 0.3 g, trimethylsilylacetylene 0.2 g, tetrakis triphenylphosphine palladium 0.05 g, tri-tert-butylphosphine 0.07 g, potassium phosphate 0.6 g, 1,4-dioxane 5 ml and water 0.5 ml was stirred at 100° C. for five hours. After cooling, the reaction mixture was extracted with ethyl acetate. The organic layer was washed with water and saturated saline, and was dried over anhydrous magnesium sulfate and was then concentrated under reduced pressure. The resulting residue was subjected to a silica gel column chromatography to give 1-{2-[2-methyl-4-(3,4,5-trimethyl-pyrazol-1-yl)-phenoxymethyl]-3-trimethylsilylethynyl-phenyl}-4-methyl-1,4-dihydrotetrazole-5-one 0.1 g.

Provenance & Evidence