Synthese neuer N, N,1,1-Tetramethyl-isobenzofuranamine
摘要:
The nitrophthalides 3 a - d aimed as intermediates in the synthesis of the title compounds 6 a - d were obtained via regioselective reduction of 3-nitro-phthalic anhydride 1 or by nitration of phthalide and 3,3-dimethylphthalide, respectively. Reductive methylation of the nitro groups afforded the dimethylaminophthalides 5 a - d which in turn were reacted with MeMgI or in the case of 5 d reduced by LiAlH4 leading finally to the title compounds.
Photoinduced intramolecular charge transfer to meta position of benzene ring in 6-aminophthalides
作者:Jerzy Karpiuk、Yuriy N. Svartsov、Jacek Nowacki
DOI:10.1039/b508708b
日期:——
at meta (6) position in relation to the electron-accepting part of the lactone ring completely changes Pd photophysics: a new long-wavelength absorption band arises and the molecule becomes highly fluorescent. The experimental data and the analysis of vertical electronic transitions with TDDFT method indicate that the first absorption band in 6-aminophthalides (6-APds) comprises a single CT transition