Synthesis of 1-N-[(2S,4S)- and (2S,4R)-5-amino-4-fluoro-2-hydroxypentanoyl]dibekacins (study on structure–toxicity relationships)
作者:Yoshiaki Takahashi、Jun Kohno、Tsutomu Tsuchiya
DOI:10.1016/s0008-6215(97)10080-5
日期:1998.1
(2S,4S)- and (2S,4R)-5-azido-2-O-benzyl-4-fluoro-2-hydroxypentanoic acids (15 and 19) have been prepared from L-malic acid (1), and coupled to the H2N-1 group of 3,2',6'-tris(N-benzyloxycarbonyl)-3 "-N-(trifluoroacetyl)dibekacin (23), to give, after reduction and deblocking, 1-N-[(2S,4S)- and [(2S,4R)-(2S,4R)-5-amino-4-fluoro-2-hydroxypentanoyl]dibekacins (26 and 27). The fluorinated arbekacin analogs showed almost the same antibacterial activities as that of arbekacin, but lower toxicity. Comparision of the toxicity between 26 (and 27) and the arbekacin analogs (28-30) with change of the 1N-side-chain indicates that the observed decrease in toxicity was a function of the chain length rather than the introduction of flourine. (C) 1998 Elsevier Science Ltd. All rights reserved.
(2S,4S)- 和 (2S,4R)-5-叠氮-2-O-苄基-4-氟-2-羟基戊二酸 (15 和 19) 由 L-苹果酸 (1) 制备而成,并与 3,2',6'-三(N-苄氧基羰基)-3"-N-(三氟乙酰基)二倍他汀 (23) 的 H2N-1 位发生偶联。经过还原和去保护后,得到 1-N-[(2S,4S)-和 (2S,4R)-5-氨基-4-氟-2-羟基戊酰]二倍他汀 (26 和 27)。含氟的链霉素类似物显示出与链霉素几乎相同的抗细菌活性,但毒性更低。将 26(和 27)与改变 1N-侧链的链霉素类似物(28-30)的毒性进行比较发现,观察到的毒性降低是由于侧链长度的变化,而非引入氟。版权 1998 Elsevier Science Ltd. 保留所有权利。