Photochromic channel blockers provide a conceptually simple and convenient way to modulate neuronal activity with light. We have recently described a family of azobenzenes that function as tonic blockers of K-v channels but require UV-A light to unblock and need to be actively switched by toggling between two different wavelengths. We now introduce red-shifted compounds that fully operate in the visible region of the spectrum and quickly turn themselves off in the dark. Furthermore, we have developed a version that does not block effectively in the dark-adapted state, can be switched to a blocking state with blue light, and reverts to the inactive state automatically. Photochromic blockers of this type could be useful for the photopharmacological control of neuronal activity under mild conditions.
作者:Alexandre Mourot、Michael A. Kienzler、Matthew R. Banghart、Timm Fehrentz、Florian M. E. Huber、Marco Stein、Richard H. Kramer、Dirk Trauner
DOI:10.1021/cn200037p
日期:2011.9.21
Photochromic channel blockers provide a conceptually simple and convenient way to modulate neuronal activity with light. We have recently described a family of azobenzenes that function as tonic blockers of K-v channels but require UV-A light to unblock and need to be actively switched by toggling between two different wavelengths. We now introduce red-shifted compounds that fully operate in the visible region of the spectrum and quickly turn themselves off in the dark. Furthermore, we have developed a version that does not block effectively in the dark-adapted state, can be switched to a blocking state with blue light, and reverts to the inactive state automatically. Photochromic blockers of this type could be useful for the photopharmacological control of neuronal activity under mild conditions.
Facile and Efficient Synthesis of 4-Azidotetrafluoroaniline: A New Photoaffinity Reagent
作者:Kareem A. H. Chehade、H. Peter Spielmann
DOI:10.1021/jo000402p
日期:2000.8.1
intermediate isocyanate generated via a modified Curtiusrearrangement with 2-methyl-2-propanol or 2-(trimethylsilyl)ethanol to form the stable carbamates 2d and 2e, respectively. Benzoic acid 2c was first converted to its acid chloride with PCl(5). Displacement of the chloride by NaN(3) in acetone/water formed the acyl azide. Thermal rearrangement followed by the addition of the appropriate alcohols