Synthesis of kanamycin a analogs containing 6-amino-3-oxa-2,3,4,6-tetradeoxy-d- and -l-glycero-hexopyranose
作者:Ryuji Kuwahara、Tsutomu Tsuchiya
DOI:10.1016/0008-6215(96)00051-1
日期:1996.6
6-Azido-3-oxa-2,3,4,6-tetradeoxy-D- and -L-glycero-hexopyranoses were synthesized in five steps from (2S)-and (2R)-1,2-O-isopropylideneglycerols, respectively. After conversion into the corresponding ethyl 1-thioglycosides, each was condensed with a protected derivative of 6-O-(3-amino-3-deoxy-alpha-D-glucopyranosyl)-2-deoxystreptamine (16). Deprotection and reduction of the azido group of the condensation
4'-Deoxy-4'-fluorokanamycins A (17) and B (25) have been prepared through fluorinative ring-opening of the D-galacto-3',4'-oxiranes (8 and 21) derived from kanamycin A and B with potassium hydrogenfluoride in ethane-1,2-diol. The mechanism of preponderant formation of the 4'-deoxy-4'-fluoro-D-gluco (9 and 22) over the 3'-deoxy-3'-fluoro-D-gulo derivatives was discussed. In the synthesis of 25, the
Site‐Selective Palladium‐catalyzed Oxidation of Unprotected Aminoglycosides and Sugar Phosphates
作者:Nittert Marinus、Niels R. M. Reintjens、Klara Haldimann、Marc L. M. C. Mouthaan、Sven N. Hobbie、Martin D. Witte、Adriaan J. Minnaard
DOI:10.1002/chem.202400017
日期:2024.4.2
Protonation of aminogroups and phosphates in aminoglycosides and sugar phosphates allows direct palladium-catalyzed site-selective oxidation without the use of protectinggroups. The site-selective oxidation of kanamycin and amikacin allowed the preparation of a set of 3’-modified aminoglycoside derivatives of which two show promising activity against antibiotic-resistant E. coli strains.