Über Derivate des Phenylbutazons. I. In den Benzolkernen hydroxylierte Derivate
作者:R. Pfister、F. Häfliger
DOI:10.1002/hlca.19570400218
日期:——
The synthesis of four derivatives of phenylbutazone with one or two hydroxy groups in the phenyl nuclei is described, among them p-hydroxy-phenylbutazone [1-(p-hydroxyphenyl)-2-phenyl-4-n-butylpyrazolidine-3,5-dione] (II) which is one of the metabolites of phenylbutazone in man.
Photoswitchable Isoprenoid Lipids Enable Optical Control of Peptide Lipidation
作者:Johannes Morstein、Taysir Bader、Ariana L. Cardillo、Julian Schackmann、Sudhat Ashok、James L. Hougland、Christine A. Hrycyna、Dirk H. Trauner、Mark D. Distefano
DOI:10.1021/acschembio.2c00645
日期:2022.10.21
successfully designed to be photoswitchable, isoprenoid lipids have not yet been investigated. Herein, we describe the development of photoswitchable analogs of an isoprenoid lipid and systematically assess their potential for the opticalcontrol of various steps in the isoprenylation processing pathway of CaaX proteins in Saccharomyces cerevisiae. One photoswitchable analog of farnesyl diphosphate (AzoFPP-1)
Tributyltin hydride when reacted with a series of substituted azoarenes afforded hydrazo compounds with high chemoselectivity and good to high yields. With ortho-substituted azoarenes, mixtures of hydrazo derivatives and N-heterocycles or cyclic products only were obtained. The kinetic law of the process was determined in the presence and in the absence of AIBN; with the radical initiator the reaction proceeds via a radical chain mechanism, whereas without AIBN the presence of stannyl free radicals could be discarded. The mechanism of the noninitiated reaction is discussed. EPR characterization of spin adducts obtained by reacting group IVB organometallic radicals with azo compounds is reported.
Photosensitive and Photoswitchable TRPA1 Agonists Optically Control Pain through Channel Desensitization