1,4,7,10-Tetraazacyclododecane → N-(2-methoxy-5-nitrobenzyl)-1,4,7,10-tetraazacyclododecane

Participants

Reaction Steps

To a stirred chloroform solution (20 ml) containing 2.9 g of 1,4,7,10-tetraazacyclododecane (16.8 mmole) was added a chloroform solution (20 ml) containing 2.1 g of 2-methoxy-5-nitrobenzyl bromide (8.5 mmole) in one portion. After stirring at room temperature for three hours the reaction mixture was filtered and the filtrate concentrated (in vacuo) to give a residue which was chromatographed (silica, Solvent System 3). The monoalkylated product was isolated in 79 percent yield (MP=154°-156° C.), and characterized by:

Provenance & Evidence