4-Bromobenzyl bromide → 3-{3-[3-(4-Bromo-benzyl)-2-imino-2,3-dihydro-benzoimidazol-1-yl]-propoxy}-benzoic acid ethyl ester, hydrobromide salt

Participants

Reaction Conditions

Reaction Steps

To a solution of 3-[3-(2-imino-2,3-dihydro-benzoimidazol-1-yl)-propoxy]-benzoic acid ethyl ester (2.45 g, 7.3 mmol) in 2-butanone (125 ml) was added 4-bromobenzylbromide (2.88 g, 11.7 mmol). The reaction was heated to 80° C. where it was maintained for 24 h. After this time the mixture was cooled to rt and filtered. The collected solids were washed with additional cold 2-butanone and then dried to give 3-{3-[3-(4-bromo-benzyl)-2-imino-2,3-dihydro-benzoimidazol-1-yl]-propoxy}-benzoic acid ethyl ester, hydrobromide salt (2.5 g, 59%). HPLC-MS 508, 510 [M+1]+.

Provenance & Evidence