Synthetic Communications p. 4279 - 4294 (1999)
Update date:2022-08-05
Topics:
Montembault
Mouaziz
Blondeau
Touchard
Soutif
Brosse
Three different routes to synthesize selectively protected tetraaza macrocycles bifunctionalized with carboxymethyl acid groups have been developed in order to obtain monomers for polycondensation. The first way has been carried out from cyclen, whose synthesis has been improved, requires 6 steps. The second way allowed to obtain the bifunctional protected macrocycle from ethylenediamine and diethyl iminodiacetate in 2 steps. The last way has consisted in synthesizing directly a monomer by cyclization from ethylenediaminetetraacetic acid bisanhydride and ethylenediamine.
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