Crystal Structures of Thiobarbiturate with N-Phenylalkyl Group and Its Photocyclization Product

Takechi, Haruko; Kubo, Kanji; Takahashi, Hidenori; Matsumoto, Taisuke

doi:10.5650/jos.60.439

Cited by 3 publications

(3 citation statements)

References 22 publications

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“…Пи-ридо[1,2-а]пиримидины перспективны также как противомикробные средства [10,11], кардиопро-текторы [12] и антикоагулянты [13]. Принимая во внимание эти факты, становится понятным стремление химиков не только предложить эф-фективные методы синтеза пиридо[1,2-а]пири-мидинов [10,14,15], но и в деталях изучить их строение [16][17][18][19][20][21][22].…”

Section: Issn 2308-8303unclassified

Improved synthesis, spectral characteristics and spatial structure of ethyl 2-hydroxy-8-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylate

Украинец¹,

Bereznyakova²,

Taran³

et al. 2014

J. org. pharm. chem.

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by-product -2-hydroxy-8-methyl-N-(4-methypyridin-2-yl)-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxamide. It has been found by X-ray diffraction analysis that in the crystal the ethyl 2-hydroxy-8-methyl-4-oxo-4H-pyrido[1,2-a] 2-амінопіридини; естери; 2-гідрокси-4-оксо-4Н-піридо[1,2-а]піримідин-3-карбонові кислоти Запропоновано покращений спосіб одержання етилового естеру 2-гідрокси-8-метил-4-оксо-4Н-піридо [1,2-а] побіч-ного 2-гідрокси-8-метил-4-оксо-N-(4-метилпіридин-2-іл)-4Н-піридо[1,2-а]піримідин-3-карбоксаміду. За до-помогою рентгеноструктурного аналізу встановлено, що в кристалі синтезований етиловий естер 2-гідрокси-8-метил-4-оксо-4Н-піридо[1,2-а]

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Section: Issn 2308-8303unclassified

Improved synthesis, spectral characteristics and spatial structure of ethyl 2-hydroxy-8-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylate

Украинец¹,

Bereznyakova²,

Taran³

et al. 2014

J. org. pharm. chem.

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“…Recently, we reported the synthesis and fluorescence properties of 7-(diethylamino)coumarin derivatives as fluoroionophores accessibleforanalyticalpurposesinthefieldsofanalyticaland biological chemistry. 1 The crystal structures of 7-(diethylamino)coumarin, 2 7-(diethylamino)-3-(dimethylamino)coumarin, 3 methyl 4-(7-diethylamino-2oxo-2H-1-benzopyran-3-yl)benzoate, 4 cholesteryl 4-(7-diethylamino-2-oxo-2H-1-benzopyran-3-yl)benzoate, 5 7-(diethylamino)-3-((4-ethoxycarbonyl)thiazol-2-yl)coumarin, 6 and7-(diethylamino)-3-phenylcoumarin 6 have been reported. We now report on the crystal structure of 7-(diethylamino)-3-(oxazol-5-yl)coumarin, (1) which was determined in order to elucidate the substituent effect at 3-and 7-positions of coumarin on the structure and crystalpacking.…”

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confidence: 99%

“…7 ThereisanintermolecularC-H·pinteraction observedinthecrystalstructureof1(Table3andFig.3),with distanceforthistypeofinteraction(2.8-3.1Å). [3][4][5][6] TheseintermolecularC-H·O,C-H·N,andCH·pinteractions helptostabilizethecrystalpacking. Table 2 Selected bond distances, bond angles and torsion angles (Å, ˚) Fig.…”

mentioning

confidence: 99%

Crystal Structure of 7-(Diethylamino)-3-(oxazol-5-yl)coumarin

Kubo

Matsumoto

Takechi

2014

X-ray Structure Analysis Online

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Organic aspects. Oxygen-containing functions

Jiménez

Miranda

2012

Photochemistry

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In this chapter, most of the reported work deals with the photochemistry of carbonyl compounds; however, the photoreactions of other functions, such as the photo-Claisen rearrangement or the photocleavage of cyclic ethers, are also included. In the present volume, time coverage is 2010–2011, and only original research articles are quoted. In general, reviews or purely theoretical calculations are not systematically included. As usually, the material is organized according to established types of reactions (e.g., Norrish I/II, hydrogen abstraction, Paternò-Büchi, photoelimination, photo-Fries/photo-Claisen, etc.). After presenting the basic photochemical aspects, more specific findings are reported. They include synthetic applications, stereoselectivity, and biological or technological implications. Next, the attention is focused on photochemical reactions in anisotropic media, including (micro)heterogeneous or supramolecular systems, solid matrixes or fully organized crystals. Finally, mechanistic studies based on direct experimental evidence are highlighted, especially when transient absorption spectroscopy or related ultrafast detection are employed.

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Crystal Structures of Thiobarbiturate with N-Phenylalkyl Group and Its Photocyclization Product

Cited by 3 publications

References 22 publications

Improved synthesis, spectral characteristics and spatial structure of ethyl 2-hydroxy-8-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylate

Improved synthesis, spectral characteristics and spatial structure of ethyl 2-hydroxy-8-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylate

Crystal Structure of 7-(Diethylamino)-3-(oxazol-5-yl)coumarin

Organic aspects. Oxygen-containing functions

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