Tetrahedron p. 5177 - 5186 (1990)
Update date:2022-08-05
Topics:
Samih, Fouzia
Prudhomme, Michelle
Dauphin, Gerard
Jeminet, Georges
The semi-synthesis of A.23187 (calcimycin) analogs 1-4 bearing the respective substituents: 5-NH2, 5-NHCH3, 5-N(CH3)2, 5-NHCOCH3 was carried out.The complexing properties of 1-4 for calcium and magnesium were determined by two-phase experiments (water/toluene-butanol 70:30 W:W) and found to be much weaker than these of A.23187 or X.14885A.There was a discrepancy with theoretical predictions made from model carboxybenzoxazoles.
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