Polyamines 1,4,7,10,13,16-Hexaazacyclooctadecane

Submitted by T, J. Atkins, J. E. Richman, and W. F. Oettle1 Checked by K. Bernauer, F. Schneider, and A. Brossi 

N -Tris p-tolylsulfonyl)diethylenetriamine (1). A 5-L, three-necked, round-bottomed flask is equipped with a mechanical stirrer, reflux condenser, thermometer, and addition funnel. In the flask are placed 1150 g. (6.03 mole) of p-toluenesulfonyl chloride (Note 1) and 3 1. of pyridine. The mixture is stirred and warmed to 50° to dissolve the solid, the flask is immersed in a 30° water bath, and a solution of 206 g. (2.0 mole) of diethylenetriamine (Note 1) in 300 ml. of pyridine is added through the addition funnel at a rate that maintains a reaction temperature of 50-60° (1 hour). The reaction mixture is kept at 50-60° for 30 minutes longer, cooled, and divided into two equal portions in 4-1. Erlenmeyer flasks. The pyridine solutions are mechanically stirred as 1000 ml. of water is slowly poured into each. After stirring overnight and finally cooling in an ice bath for 2 hours, the white solid is collected by filtration, thoroughly washed with ice-cold 95% ethanol, and dried in a vacuum oven at 100°. The yield of triamine 1 is 950-1015 g. (84-90%), m.p. 173-175°. 

9-Tns(p-toly/sul/ony/)-3,6,9-friazaundecane-l,ll-dioZ (3). A 2-1., three-necked, round-bottomed flask is equipped with a mechanical stirrer, thermometer, reflux condenser, and heating mantle. In the flask are placed 226 g. (0.40 mole) of triamine 1, 77.5 g. (0.88 mole) of ethylene carbonate (Note 1), and 0.7 g. of powdered potassium hydroxide. The stirred mixture is heated at 160-170° for 4 hours (Note 3). The reaction mixture is then allowed to cool to 90°, and 500 ml. of methanol is added through 

9-Tris(p-tolylsulfonyl)-3,6,9-triazaundecane-l,ll-dimeth-anesulfonate (4). A 3-1., three-necked, round-bottomed flask is equipped with a mechanical stirrer, addition funnel, nitrogen inlet, and low-temperature thermometer. The flask is charged with a dried solution of 200 g. (0.306 mole) of diol 3 and 100 ml. of triethylamine in 1500 ml. of methylene chloride (Note 5). The stirred solution is held at -15 to -20° in a dry-ice-acetone bath as 50 ml. (74 g.) of methanesulfonyl chloride (Note 1) is added over 10 minutes. The dry-ice bath is replaced by an ice bath, and the solution is stirred for 30 minutes, poured into a mixture of 11. of crushed ice and 500 ml. of 10% aqueous HC1 solution, and shaken. The layers are separated, and the organic layer is washed with two 500-ml. portions of water and 500 ml. of saturated salt solution, then dried over anhydrous magnesium sulfate. The solution is filtered and evaporated to dryness under reduced pressure to give a white solid, which is dissolved in 250 ml. of methylene chloride and crystallized by addition of 500 ml. of ethyl acetate and cooling in an ice bath. The yield of methanesulfonate 4 is 215-235 g. (87-95%), m.p. 146-148°. 

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