1147358-84-6Relevant articles and documents
Design, synthesis, and antibacterial activities of conformationally constrained kanamycin A derivatives
Zhang, Wenxuan,Chen, Ying,Liang, Qingzhao,Li, Hui,Jin, Hongwei,Zhang, Liangren,Meng, Xiangbao,Li, Zhongjun
, p. 400 - 409 (2013/03/14)
A series of conformationally constrained kanamycin A derivatives with a 2′-hydroxyl group in ring I and a 5-hydroxyl group in ring II tethered by carbon chains were designed and synthesized. Pivotal 5,2′-hydroxyl groups were exposed, and the kanamycin A intermediate was synthesized from 5, 2′, 4″, 6″-di-O-benzylidene-protected tetraazidokanamycin A. Cyclic kanamycin A derivatives with intramolecular 8-, 9-, 10-, and 11-membered ethers were then prepared by cesium carbonate mediated Williamson ether synthesis or a ring-closing metathesis reaction. The kanamycin A derivatives were assayed against both susceptible and resistant bacterial strains. Although no derivative showed better antibacterial activities than kanamycin A, the antibacterial activities of these cyclic kanamycin A derivatives indeed varied with the length of the bridge. Moreover, different variations of activities were observed between the susceptible and resistant bacterial strains. More tightly constrained derivative 2 with a one-carbon bridge showed better activity than the others against susceptible strains, but it was much less effective for resistant bacterial strains than derivative 3 with a two-carbon bridge and derivative 6 with an unsaturated four-carbon bridge.