A facile one-pot synthesis of α-fluoro-α,β-unsaturated esters from alkoxycarbonylmethyltriphenylphosphonium bromides
作者:Yumiko Suzuki、Masayuki Sato
DOI:10.1016/j.tetlet.2003.12.103
日期:2004.2
A convenient one-pot synthesis of alpha-fluoro-alpha,beta-unsaturated esters from ethoxy- and tert-butoxycarbonylmethyltriphenylphosphoniurn bromide was developed. The fluorinated phosphoranes, generated in situ from alkoxycarbonylmethyltriphenylphosphoniurn bromides and 1-chloromethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate) (Selectfluor(R)), undergo a Wittig reaction with aldehydes to yield alpha-fluoro-alpha,beta-misaturated esters with (Z)-selectivity. (C) 2003 Elsevier Ltd. All rights reserved.
Syntheses of tolrestat analogs containing additional substituents in the ring and their evaluation as aldose reductase inhibitors. Identification of potent, orally active 2-fluoro derivatives
作者:Jay Wrobel、Jane Millen、Janet Sredy、Arlene Dietrich、Beverly J. Gorham、Michael Malamas、Joseph M. Kelly、John G. Bauman、Maria C. Harrison
DOI:10.1021/jm00112a029
日期:1991.8
A series of aldosereductaseinhibitors were prepared which were analogues of the potent, orallyactiveinhibitortolrestat (1). These compounds (5, 7, 9, and 10) have an extra substituent on one of the unoccupied positions on the naphthalene ring of 1. Primary amide prodrugs of several members from the series 5 and 7, namely 6 and 8, respectively, were also prepared. These compounds were evaluated