Sodium hydride → 1-(2-Methyl-3-triisopropylsilanylsulfanylphenyl)-4-methyl-1,4-dihydrotetrazole-5-one

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Reaction Conditions

Reaction Steps

Under ice-cooling, to a mixture of triisopropylsilanethiol 4.99 g and tolune 30 ml was added 60% sodium hydride 0.63 g, and the resulting mixture was stirred for thirty minutes. To the reaction mixture was added 1-(2-methyl-3-bromophenyl)-4-methyl-1,4-dihydrotetrazole-5-one (described in Reference Preparation example 10) 2.82 g and [1,1′-bis(diphenylphosphino)ferrocene]palladium(II) dichloride dichloromethane adduct 0.856 g. The reaction mixture was heated to 90° C. and was stirred for four hours. After cooling the reaction mixture, thereto was added water and the resulting 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-methyl-3-triisopropylsilanylsulfanylphenyl)-4-methyl-1,4-dihydrotetrazole-5-one 3.64 g.

Provenance & Evidence