Tributyltin Chloride → 1-methyl-3-tributylstannanyl-1H-indazole-5-carbonitrile

Participants

Reaction Conditions

Reaction Steps

In a round-bottomed flask, 3-iodo-1-methyl-1H-indazole-5-carbonitrile (383 mg, 1.35 mmol) was partially dissolved in THF (10 ml). The light yellow suspension was cooled to −16° C. (NaCl/ice bath) and isopropylmagnesium chloride (2.0 M in THF, 0.82 ml, 1.64 mmol) was added dropwise. The reaction mixture was stirred at −16° C. for 30 min then tributylchlorostannane (0.43 ml, 1.59 mmol) was slowly added. The reaction mixture was allowed to warm to room temperature and stirred for 1.5 h then quenched with saturated aqueous NH4Cl and extracted with EtOAc (2×). The combined organic layers were washed with water and brine then dried over sodium sulfate, filtered and concentrated to provide 1-methyl-3-tributylstannanyl-1H-indazole-5-carbonitrile as a brown oil which was used without further purification.

Provenance & Evidence