1,5-Diazabicyclo(4.3.0)non-5-ene → N-[(6-bromopyridin-2-yl)methoxy]-1-(1-methyl-1H-tetrazol-5-yl)-1-phenylmethanimine

Participants

Reaction Conditions

Reaction Steps

To a cooled (0° C.) stirred solution of N-hydroxy-1-(1-methyl-1H-tetrazol-5-yl)-1-phenylmethanimine (6.47 g, 31.88 mmol, 1.0 eq.) in 250 ml of MeCN, was added dropwise DBN (4.35 g, 35.07 mmol, 1.0 eq.). The reaction was stirred for 5 mins before addition of 2-bromo-6-(bromomethyl)pyridine (8.8 g, 35.07 mmol, 1.1 eq.) portionwise. The mixture was stirred for further 5 mins before removal of the cooling bath and continued at ambient temperature. MeCN was evaporated and the residue was purified by chromatography on silica gel to yield N-[(6-bromopyridin-2-yl)methoxy]-1-(1-methyl-1H-tetrazol-5-yl)-1-phenylmethanimine (9.4 g, 75% yield, 10:1 mixture of stereoisomers) as a pale yellow oil.

Provenance & Evidence