2,2-Dimethyl-2,3-dihydropyrano[2,3-a]carbazol-4(11H)-one
نویسندگان
چکیده
The title compound, C(17)H(15)NO(2), was prepared from 1-hydroxy-carbazole and 3,3-dimethyl-acrylic acid with a mixture of AlCl(3) and POCl(3) as the cyclization catalyst. Owing to the presence of the -CMe(2)- group, the mol-ecule is not quite planar. In the crystal structre, strong N-H⋯O hydrogen bonds and weaker C-H⋯π inter-actions occur, and a slipped π-π stacking inter-action [centroid-centroid separation = 3.8425 (8) Å] is also observed.
منابع مشابه
2,2,9-Trimethyl-2,3-dihydropyrano[2,3-a]carbazol-4-(11H)-one
The title compound, C(18)H(17)NO(2), was prepared from 1-hydr-oxy-7-methyl-carbazole and 3,3-dimethyl-acrylic acid with trifluoro-acetic acid as the cyclization catalyst. The mol-ecules contain an essentially planar 6-methyl-indole unit. The second aromatic ring is significantly bent away from the plane of this unit, with maximum deviations of 0.171 (1) and 0.185 (1) Å for two of the C atoms. I...
متن کامل2,2,10-Trimethyl-2,3-dihydropyrano[2,3-a]carbazol-4(11H)-one
The title compound, C(18)H(17)NO(2), was prepared from 1-hydr-oxy-8-methyl-carbazole and 3,3-dimethyl-acrylic acid with trifluoro-acetic acid as the cyclization catalyst. Due to the -CMe(2)- group, the mol-ecule is not quite planar. The packing is dominated by the strong N-H⋯O hydrogen bonds and some weaker C-H⋯O and C-H⋯π inter-actions. π-π Stacking inter-actions [centroid-centroid separation ...
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متن کامل5,9,11-Trihydroxy-2,2-dimethyl-3-(2-methylbut-3- en-2-yl)pyrano[2,3-a]xanthen-12(2H)-one from the Stem Bark of Calophyllum tetrapterum Miq
A new pyranoxanthone namely 5,9,11-trihydroxy-2,2-dimethyl-3-(2-methylbut-3-en-2-yl) pyrano[2,3-a]xanthen-12(2H)-one (1) was isolated from the stem bark of Calophyllum tetrapterum Miq. The structure of compound 1 was determined by means of spectroscopic methods including UV, IR, HRESIMS, 1D and 2D NMR.
متن کاملmolbank Short Note 5,9,11-Trihydroxy-2,2-dimethyl-10-(3′-methyl-2′- butenyl)-3-(2”-methyl-3”-butenyl)pyrano[2,3- a]xanthen-12(2H)-one from the Stem Bark of Calophyllum pseudomole
5,9,11-Trihydroxy-2,2-dimethyl-10-(3′-methyl-2′-butenyl)-3-(2”-methyl-3”-butenyl)pyrano[2,3-a]xanthen-12(2H)-one (1) was isolated from the stem bark of Calophyllum pseudomole. The structure of 1 was established by spectroscopic analysis which included UV, IR, HRESIMS and NMR experiments.
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عنوان ژورنال:
دوره 64 شماره
صفحات -
تاریخ انتشار 2008