全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:... Toyotoshi Ueda , Junji Aoki , Minoru Takekawa
来源:[J].Synthetic Communications(IF 1.06), 2012, Vol.42 (6), pp.784-793Taylor & Francis
摘要:Abstract(#br)7 H -Naphtho[1,8- gh ]quinolin-7-one was prepared by the glycerol condensation of 3-aminophenalenone in good yields. This method provides a new and convenient synthesis of the compound. NMR spectra of its related compounds were measured, and the rapid interchang...
作者:Minoru Takekawa , Yasuto Fujimaki ...
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 2002, Vol.22 (3-4), pp.259-266Taylor & Francis
摘要:Chloro-7 H -benz[ de ]anthr-7-ones (chlorobenzanthrones) are useful as starting materials for synthesis of larger polycyclic aromatic compounds by means of condensation. In the synthesis, the position of the chlorine atom is very important because the structure of condensati...
作者:Minoru Takekawa , Yasuto Fujimaki ...
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 2002, Vol.22 (3-4), pp.259-266Taylor & Francis
摘要:Chloro-7 H -benz[ de ]anthr-7-ones (chlorobenzanthrones) are useful as starting materials for synthesis of larger polycyclic aromatic compounds by means of condensation. In the synthesis, the position of the chlorine atom is very important because the structure of condensati...
作者:... Shigeru Ohshima , Minoru Takekawa , Shoji Fujisawa
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 1999, Vol.14 (1-4), pp.77-86Taylor & Francis
摘要:Complete assignments of NMR spectra were made for benzanthrones, using 2D correlation spectroscopic techniques of homonuclear H-H COSY and NOESY and heteronuclear CH-COSY and COLOC methods. The nitration positions for 6H-benzo[cd] pyren-6-one (1), 13H-dibenzo[a, de]anthracen-13-o...
作者:Minoru Takekawa , Yumi Nakamura ...
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 1999, Vol.14 (1-4), pp.99-108Taylor & Francis
摘要:Dibenzo[h,rst]naphtho[8,1,2-cde]pentaphcne (9) has been synthesized by the condensation of a mixture of 1-phcnalenone (1) and 13H-dibenz[a,de]anthracene-13-one (2) with zinc dust in the presence of ZnCl2 and NaCl. On the other hand, dibenz[a,lmn]anthra[1,2,9-hij]perylene (17) has...
作者:... Rie Yagi , Minoru Takekawa , Shoji Fujisawa
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 2000, Vol.19 (1-4), pp.155-164Taylor & Francis
摘要:Benz[a]anthracene-7, 12-dione (1) was nitrated directly by nitric acid and a nitro-derivative (2) was obtained. Molecular orbital calculation predicted that the nitration reaction occurs in the C1 or C4 position of (1). To determine the position of the nitro group of (2), NM...
作者:Minoru Takekawa , Akira Uchida ...
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 2000, Vol.19 (1-4), pp.189-197Taylor & Francis
摘要:Nitration of three isomeric dibenzanthrones, 13H-dibenzo[a,de]-anthracene-13-one(3), 7H-benzo[hi]chrysene-7-one(4), and 7H-dibenzo[a,kl]anthracene-7-one(5), with concentrated nitric acid was studied under various conditions. The nitration of (3) at 15 °C in 1,1,2,2-tetrachlo...
作者:... Yasuto Fujimaki , Minoru Takekawa , Shoji Fujisawa
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 2002, Vol.22 (3-4), pp.289-293Taylor & Francis
摘要:We have synthesized undecacyclic aromatic hydrocarbons using condensation of dibenzoanthrones. For example, dibenzo[ a,o ]dinaphtho[3,2,1- cd ;1,2,3- lm ]perylene, diphenanthra[1,2,3- cd ; 3,2,1- lm ]perylene and diphenanthra[2,3,4- cd ;4,3,2- lm ]perylene were produced from...
作者:... Yasuto Fujimaki , Minoru Takekawa , Shoji Fujisawa
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 2002, Vol.22 (3-4), pp.433-440Taylor & Francis
摘要:To identify nitrobenzanthrones (NBAs) such as 3-nitro-7 H -benz[ de ]anthracene-7-one (3-NBA) on the basis of their electronic spectral data, we have synthesized 1-, 2-, 3-, 9-, and 10-NBAs and measured their absorption and emission spectra. The first strong absorption band ...
作者:Minoru Takekawa , Junji Aoki ...
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 2002, Vol.22 (3-4), pp.249-258Taylor & Francis
摘要:The relation between the yields of three isomers of violanthrone--violanthrone A (VOA), violanthrone B (VOB), and isoviolanthrone A (isoVOA)--and the condition of the alkali fusion of benzanthrone have been studied. When the method of alcoholic alkali fusion was applied to benzan...

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