Substituent effects on absorption and fluorescence spectra of carbostyrils
作者:Walter M.F. Fabian、Karlheinz S. Niederreiter、Georg Uray、Wolfgang Stadlbauer
DOI:10.1016/s0022-2860(98)00616-4
日期:1999.3
Abstract Absorption and fluorescence spectra as well as quantum yields of a series of differently substituted carbostyrils (quinolin-2(1H)-ones) are reported. Especially for compounds containing donor substituents in position 6, substantial bathochromic shifts (comparable to analogous coumarins) of both absorption as well as fluorescence transitions are obtained. High absorption intensities and quantum
Potential non-steroidal estrogens and antiestrogens, IV Organic azides in heterocyclic synthesis, part 13: Synthesis of aza- and diazacoumestrols via azido derivatives
4-Chloro-3-aryl-coumarins and quinolones 2 a-e undergo thermolytic ring closure by reaction with sodium azide in refluxing dimethyl formamide to yield indolo[3,2-c]coumarins and indolo[3,2-c]quinolin-6(5H)-ones 6 a-e. In the case of the coumarin 2 a the azido coumarin 5 can be isolated. The mono- and diazacoumestrol-dimethylethers 6 a-c are converted into the coumestrol analogues 7 a-c and their diacetyl derivatives 8 a-c.
Stadlbauer, Wolfgang; Laschober, Rita; Kappe, Thomas, Liebigs Annalen der Chemie, 1990, # 6, p. 531 - 539
作者:Stadlbauer, Wolfgang、Laschober, Rita、Kappe, Thomas