The autoxidation of alpha-silyl carbanions derived from 9-trimethysilyl- and 9-triphenylsilyl-10-methylacridanes (1a and 1b) produced the fluorescent N-methylacridone (NMA) accompanied by weak chemiluminescence. Differences in the chemiluminescence quantum yields and the time course of the light emission were detected between the reactions of la and 1b, which was due to the substituent on the silicon atom. Additionally, the 9-trimethylsilyl-10-methylacridinium salt also underwent a chemiluminescent reaction when reacted with alkaline hydrogen peroxide. It is probable that these chemiluminescent reactions would proceed via the Peterson-type reaction and involve the dioxasiletanide-like species during the reaction pathway.
Sc(OTf)<sub>3</sub>-Catalyzed Dehydrogenative Cyclization for Synthesis of <i>N</i>-Methylacridones
作者:Xi-An Li、Hong-Li Wang、Shang-Dong Yang
DOI:10.1021/ol400371h
日期:2013.4.19
A novel method has been developed for the synthesis of substituted N-methylacridones from 2-(N-methyl-N-phenylamino)benzaldehydes via dehydrogenative cyclization. This transformation involves two primary processes: the aldehyde first coordinates with Sc(OTf)(3) and induces the aromatic electrophilic substitution (SEAr) reaction to form the active intermediate N-methyl-acridin-9-ol, which is then quickly oxidized in situ to afford the acridones. Furthermore, the procedure involved is both environmental friendly and atom efficient; H2O is the only byproduct in this reaction.
Redox potentials and acid-base equilibria of NADH/NAD+ analogs in acetonitrile
作者:Agnes Anne、Jacques Moiroux
DOI:10.1021/jo00302a026
日期:1990.7
370. The ionization of basic triphenylmethane dyes
作者:R. J. Goldacre、J. N. Phillips
DOI:10.1039/jr9490001724
日期:——
Kroehnke; Honig, Chemische Berichte, 1957, vol. 90, p. 2215,2225