Disclosed herein are KCNQ potassium channels modulators of formula (I)
wherein G
1
, R
2
, R
1a
, R
1b
, X, X
1
, X
2
, X
3
, R
x
, J, k, n, q, and t are as defined in the specification. Compositions comprising such compounds; and methods for treating conditions and disorders using such compounds and compositions are also described.
Steric effects on reaction rates II: Rate and equilibrium constants for oxidation of bicyclic alcohols
作者:Paul Müller、Jacky Blanc
DOI:10.1016/0040-4039(81)80131-1
日期:1981.1
Equilibrium constants for oxidation of a series of bicyclic alcohols with cyclohexanone have been determined under Meerwein-Ponndorf conditions. The data provide the thermodynamic background for interpretation of the mechanism of alcohol oxidation and ketone reductions. Free energies of the equilibrium (ΔGox) are compared with values calculated by molecular mechanics.
The free radical addition reactions of [1.1.1] propellane (1) are described in some detail and allowed the preparation of a wide variety of 1,3-disubstituted bicyclo [1.1.1.] pentanes. The reaction of 1 with free radicals was more rapid than that of bicyclo [1.1.0] butane (2), whereas bicyclo [2.1.0] pentane (3) was relatively inert
Photochemistry of 1,5-hexadien-3-ones: wavelength-dependent selectivity in intramolecular enone-olefin photoadditions
作者:William G. Dauben、Jeffrey M. Cogen、George A. Ganzer、Victor Behar
DOI:10.1021/ja00015a041
日期:1991.7
The photochemistry of ten 1,5-hexadien-3-ones in methanol is studied over the wavelength range of 313-366 nm, by using monochromatic light. With the goal of understanding the unusual wavelength-dependent selectivity observed for 5-methyl-1,5-hexadien-3-one (1), quantum yield measurements, structure reactivity studies, triplet sensitization, and quenching experiments are performed. While six of the