A 4-tert-butylcalix[4]arene tetrahydroxamate podand based on the 1-oxypiperidine-2-one (1,2-PIPO−) chelate. Self-assembly into a supramolecular ionophore driven by coordination of tetravalent zirconium or hafnium(iv)
A 4-tert-butylcalix[4]arene tetrahydroxamate podand based on the 1-oxypiperidine-2-one (1,2-PIPO−) chelate. Self-assembly into a supramolecular ionophore driven by coordination of tetravalent zirconium or hafnium(iv)
1-Hydroxy-3-amino-2-piperidone (.delta.-N-hydroxycycloornithine) derivatives: key intermediates for the synthesis of hydroxamate-based siderophores
作者:Teodozyj Kolasa、Marvin J. Miller
DOI:10.1021/jo00293a010
日期:1990.3
Synthesis of the Peptide Fragment of Pseudobactin
作者:John F. Okonya、Teodozyj Kolasa、Marvin J. Miller
DOI:10.1021/jo00112a009
日期:1995.4
Synthesis of the peptide fragment, L-Lys-D-threo-beta-OH-Asp-L-Ala-D-allo-Thr-L-Ala-N-OH-D-cOrn, of pseudobactin (2) is reported. By utilizing 2-ethoxy-1-(ethoxycarbonyl)-1,2-dihydroquinoline (EEDQ) as a coupling reagent, peptide bonds were constructed without requiring protection of hydroxyl groups. To access the D-allo-Thr residue in the peptide fragment of pseudobactin, the Thr residue in N-Cbz-L-Ala-D-Thr-L-Ala . O-t-Bu (4b) was converted to a peptidyl oxazoline using Burgess' reagent. Hydrolysis of the oxazoline with 1 N HCl followed by base-catalyzed acyl migration then provided the D-allo-Thr analog 4a.
KOLASA, TEODOZYJ;MILLER, MARVIN J., J. ORG. CHEM., 55,(1990) N, C. 1711-1721