Desymmetrization reactions: A convenient synthesis of aromatic diamide diamines
A two-step process for the synthesis of various diamide diamines derived from 1,n-diamino benzene compounds is described. The amidation reaction is simple, mild, involves readily available bis(N-acylthiazolidine-2-thione) derivatives as acylating agents and requires only stoichiometric equivalents of diamine and acylating agents.
Picard,Arnaud,Tisnès
p. 1471 - 1478
(2007/10/03)
Access to Macrocyclic Lactams. Application to a New Series: the Dibenzotetralactams
A facile route is described for the synthesis of macrocyclic dibenzotetralactams derived from 1,2-diaminobenzene based on a stepwise approach using diacid dichlorides or mixed pivalic dianhydrides for ring closure.This method is applicable for the prepara
Arnaud, Nathalie,Picard, Claude,Cazaux, Louis,Tisnes, Pierre
p. 5531 - 5534
(2007/10/02)
Macrocyclic polyether tetralactams I: Synthesis and cyclization studies
A three-step method for the synthesis of new 18,21 or 24-membered macrocyclic tetralactams with two dimethyleneoxy moieties is described. The method consists in the ring closure of a bis-secondary amine with a diamide diacid derivative activated by the th
Duriez,Pigot,Picard,Cazaux,Tisnes
p. 4347 - 4358
(2007/10/02)
A BARIUM SELECTIVE MACROCYCLIC TETRALACTAM WITH DIMETHYLENEOXY MOIETIES
Two new 18-membered tetralactams with two dimethyleneoxy moieties are synthesized by direct macrocyclization or steps reaction.In the latter case symmetrical or unsymmetrical compounds can be obtained.The unsymmetrical tetralactam shows a very high selectivity for barium vs.Na+ and Zn2+ and to a lesser extent vs.K+, Mg2+ and Ca2+ in the extraction procedure with picrates.In addition, the stability constants are determined for the two 1:1 tetralactam:Ba2+ complexes by UV spectrophotometry in THF solution.
Cazaux, Louis,Duriez, Marie-Christine,Picard, Claude,Tisnes, Pierre
p. 1369 - 1372
(2007/10/02)
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