A highly convergent strategy for the synthesis of 4-demethoxydaunomycinone and daunohycinone: A novel synthesis of C4-acetoxylated homophthalic anhydrides
作者:Yasumitsu Tamura、Manabu Sasho、Shuji Akai、Hisakazu Kishimoto、Jun-ichi Sekihachi、Yasuyuki Kita
DOI:10.1016/s0040-4039(00)83975-1
日期:1986.1
The C4-acetoxyl derivatives of homophthalicanhydrides were prepared by a convenient α-acetoxylation of homophthalic acid followed by a dehydrative cyclization. The anhydrides have been converted into 4-demethoxydaunomycinone and daunomycinone in excellent overall yields.
MexAB-OprM-Specific efflux pump inhibitors in Pseudomonas aeruginosa. Part 1: Discovery and early strategies for lead optimization
作者:Kiyoshi Nakayama、Yohei Ishida、Masami Ohtsuka、Haruko Kawato、Ken-ichi Yoshida、Yoshihiro Yokomizo、Shigeru Hosono、Toshiharu Ohta、Kazuki Hoshino、Hiroko Ishida、Kumi Yoshida、Thomas E. Renau、Roger Léger、Jason Z. Zhang、Ving J. Lee、William J. Watkins
DOI:10.1016/j.bmcl.2003.07.024
日期:2003.12
The identification of a series of compounds that specifically inhibit efflux by the MexAB-OprM pump system in Pseudomonas aeruginosa is described. Synthesis and in vitro structure-activity relationships (SARs) are outlined. Early leads lacked activity in animal models, and efforts to improve solubility and reduce serum protein binding by the introduction of polar groups are discussed. (C) 2003 Elsevier Ltd. All rights reserved.