A. Dumont, V. Jacques, Peng Qixiu
May 30, 1994
Citations
0
Influential Citations
44
Citations
Journal
Tetrahedron Letters
Abstract
The reaction of 1,4,7,10-tetraazacyclododecane with p-toluenesulfonyl chloride in pyridine or with diethyl phosphite and CCl4 in a water/CH2Cl2 mixture yields selectively the 1,7-diprotected regioisomer. The 1,7-diprotected tetraaza cycles are interesting starting materials, for instance for the preparation of 4,10-bis(2′-hydroxyethyl)-1,7-bis(carboxymethyl)-1,4,7,10-tetraazacyclododecane.