Acridanone derivatives of the formula ##STR1## wherein the dotted line is an optional bond, R.sup.1 is hydrogen, halogen or nitro, R.sup.2 is hydrogen or lower alkyl, one of the substituents R.sup.3 and R.sup.4 is hydrogen or lower alkyl and the other together with R is an additional bond and R.sup.5 is hydrogen, lower alkyl, lower alkenyl, lower alkynyl or lower alkyl substituted by halogen or lower alkoxy, and pharmaceutically acceptable acid addition salts thereof, processes for their preparation and pharmaceutical compositions based thereon, are described. The compounds of formula I are useful as schistosomicidal agents.
effect of the waste product hydrogen peroxide. It generates radicals in the presence of acid and ketones, which accelerate the reaction by providing an additional pathway to the reactive hydroperoxide intermediate. This discovery could be applied to achieve other Brønsted acid catalyzed oxidative coupling reactions.
Anisotropic Dissociation of π-π Stacking and Flipping-Motion-Induced Crystal Jumping in Alkylacridones and Their Dicyanomethylene Derivatives
作者:Takashi Takeda、Tomoyuki Akutagawa
DOI:10.1002/chem.201600794
日期:2016.6.1
2 a,b,d showed crystal‐jumping activity upon heating. This is the first example of thermosalient behavior in a simple aromatic ketone and its derivatives. A systematic investigation of the jumping behavior of derivatives with different alkyl chains by variable‐temperature X‐ray crystal‐structure analyses revealed the mechanism of this phenomenon. Anisotropicdissociation of π stacking in a dimer was
A Convenient Preparation of Some<i>N</i>-Alkylcarbazoles and<i>N</i>-Alkylacridones
作者:Hisao Nishi、Hisao Kohno、Toshihiro Kano
DOI:10.1246/bcsj.54.1897
日期:1981.6
N-Alkylation of aromatic compounds involving nitrogen heterocycles such as carbazole and acridone with alkyl halide in the presence of caustic solution and benzyl triethyl ammonium chloride (BTEAC) as a phase-transfer catalyst readily proceeded under mild conditions. These results show that this procedure is effective for the preparation of the title compounds in high yields.