About the “physiological size” of fluorine substituents: Comparison of sensorially active compounds with fluorine and methyl substituted analogues
作者:Manfred Schlosser、Dominique Michel
DOI:10.1016/0040-4020(95)00886-d
日期:1996.1
taste of four fluoro substituted derivatives (2a, 2b, 2c and 2d) is almost indistinguishable from that of the parent compound 4-(4-hydroxyphenyl)butan-2-one (1), the main flavor component of raspberries. The same holds for the comparison between the corresponding acetate, another raspberry ingredient, and its 1-fluoro analogue (2e). In contrast, methyl substituents (as present in compounds 3a, 3b, 3c
Highly Chemo- and Regioselective Reaction of Hydroxybenzenes in Acidic Ionic Liquid
作者:Hui Guo、Yu Wei Zhuang、Jian Cao、Guo Bao Zhang
DOI:10.5012/bkcs.2013.34.9.2594
日期:2013.9.20
Highly chemo- and regioselective reaction of hydroxybenzenes with $\alpha},\beta}$-unsaturated compounds in acidic ionic liquid l-butyl-3-methylimidazolium hydrogen sulphate ([BMIM]HSO4) was reported for the first time. A series of oxa-Michael adducts and Friedel-Crafts alkylated products were synthesized with good yields. The acidic ionic liquid could be easily recycled for at least 5 times with only minor loss in activity.
Compounds that are central nervous system drug candidates for the treatment of cognitive decline and, more particularly, Alzheimer's disease are provided. Methods of treating, inhibiting, and/or abatement of cognitive decline and/or Alzheimer's disease with a compound or pharmaceutically acceptable salt of the invention are also provided. Also provided are methods of preparing the compounds/compositions of the invention.