A convenient base-mediated synthesis of 3-aryol-4-methyl (or benzyl)-2-methylthio furans from α-oxo ketene dithioacetals and propargyl alcohols via domino coupling/annulations
A convenient base-mediated synthesis of 3-aryol-4-methyl (or benzyl)-2-methylthio furans2has been developed through the domino coupling/annulations from α-oxo ketene dithioacetals1and propargyl alcohols.
A series of new 4-[5-(4-phenoxyphenyl)-2H-pyrazol-3-yl]morpholine derivatives, prepared by two synthetic routes, were in vitro assayed against three Trypanosoma strains, Leishmania donovani, and Plasmodium falciparum K1. Seven out of 17 compounds showed moderate to very good activity against blood stage T. b. rhodesiense, with 10 and 17 exhibiting highest potency (IC50 of 1.0 and 1.1 mu M, respectively). Interestingly, the beta-diketone precursors 1-3 had good antitrypanosomal activity toward the insect stage, with IC50 values of 1.0-3.4 mu M. Among different compounds with moderate activity against T. cruzi, compound 17 showed the lowest IC50 value of 9.5 mu M; thus, the series seemed to act selectively toward the different Trypanosoma parasites. Eight compounds were moderately active against L. donovani, with 2, 3, and 12 being the most promising ones (IC50 values of 2.3-5.2 mu M), whereas compound 14 was the only derivative with good activity against P. falciparum (IC50 of 3.7 mu M).
TOMISAWA, KAZUYUKI;KAMEO, KAZUYA;MATSUNAGA, TOHRU;SAITO, SHIUJI;HOSODA, K+, CHEM. AND PHARM. BULL., 1986, 34, N 2, 701-712
Studies on hypolipidemic agents. III. .OMEGA.-(4-Phenoxybenzoyl)alkanoic acid derivatives.
作者:KAZUYUKI TOMISAWA、KAZUYA KAMEO、TOHRU MATSUNAGA、SHIUJI SAITO、KAZUAKI HOSODA、YUMIKO ASAMI、KAORU SOTA
DOI:10.1248/cpb.34.701
日期:——
2-Acetylthio-3-(4-substituted phenoxybenzoyl)propionic acids and various other ω-(4-phenoxybenzoyl)alkanoic acid derivatives were prepared, and tested for hypolipidemic activity in normal rats. Some of these compounds were active. 2-Acetylthio-3-(4-phenoxybenzoyl)propionic acid derivatives seemed to have the most potent hypocholesterolemic activities, and halogen substitution on the phenoxy group increased the activity.