Synthesis and structure of new 3-pyrazolinylcoumarins and 3-pyrazolinyl-2-quinolones
作者:V. F. Traven、A. V. Manaev、I. V. Voevodina、I. N. Okhrimenko
DOI:10.1007/s11172-008-0195-4
日期:2008.7
The reactions of substituted 3-cinnamoyl-4-hydroxycoumarins and 3-cinnamoyl-4-hydroxy-2-quinolones with different phenylhydrazines gave 3-hetaryl-1H-4,5-dihydropyrazoles. The product structures were studied by 1H NMR spectroscopy and mass spectrometry. 4-Hydroxy-3-pyrazo-linylcoumarins exist in DMSO as two tautomers (4-enol and chromane-2,4-dione), while 4-hydroxy-3-pyrazolinyl-2-quinolones exist only in the enol form.
Synthesis of nicotinonitrile derivatives and study of their photophysical properties
作者:Raghunath B. Toche、Muddassar A. Kazi、Prashant S. Nikam、Dinesh C. Bhavsar
DOI:10.1007/s00706-011-0453-2
日期:2011.3
AbstractA convenient route was developed for the synthesis of novel nicotinonitrilederivatives by a three-component Dimroth reaction of chalcones, malononitrile, and secondary heterocyclic amines or sodium alcoholate. Nicotinonitrilederivatives are obtained in fair to good yields. The structures of all new compounds were established by spectroscopic characteristics and their photophysical properties