Azido(trimethyl)stannane → 1-[(2'-(Trimethylstannyltetrazol-5-yl)biphenyl-4-yl)methyl]-2-butyl-4-chloro-5-hydroxymethylimidazole

Participants

Reaction Conditions

Reaction Steps

1-[(2'-Cyanobiphenyl-4-yl)methyl]-2-butyl-4-chloro-5-hydroxymethylimidazole (766 g), trimethyl tin azide (766 g) and xylenes (7.90 L) were charged to a 12 liter round-bottomed flask equipped with mechanical stirrer, condenser with N2 inlet and thermometer contained in a heating mantle. The slurry was heated to 115° C., giving a clear solution, and held for 41 hours. The resulting slurry was cooled to room temperature and the crude product isolated by vacuum filtration, washed with toluene (800 ml) and dried in vacuo at ~50° C. overnight. The crude product (1202 g) was charged to a 12 liter round-bottomed flask and slurried at 105° C. with toluene (70 L). The slurry was cooled to 50° C. and the product isolated by vacuum filtration, washed with one liter of toluene and dried in vacuo at 50° C. overnight. Yield: 1071 g, 94%. M.P.: 211°-214° C.

Provenance & Evidence