Azaheterocycles Based on a,ß-Unsaturated Carbonyls by Valentin A. Chebanov, Sergey M. Desenko, Thomas W. Gurley

By Valentin A. Chebanov, Sergey M. Desenko, Thomas W. Gurley

This monograph is dedicated to heterocyclization of aliphatic and fragrant a,ß-unsaturated carbonyls with a number of binucleophiles. those reactions produce in part hydrogenated nitrogen-containing heterocycles which are fascinating as a result of their major position in organic methods. they are often utilized in conjunction with combinatorial excessive throughput tools that contain microwave-assisted and ultrasonic-promoted reactions. The monograph is a complete evaluate of the identified literature info dedicated to the reactions of a,ß-unsaturated ketones, their man made equivalents and precursor. it really is meant for chemists operating within the box of experimental syntheses and theoretical investigations of nitrogen-containing heterocycles, teachers at collage and graduate students.

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Photochromic properties of the hydrochlorides of 1-(4-nitrophenyl)-6phenyl-3,5a-dihydro-1H-azireno[1,2-c]imidazole 72 and 1-(4-nitrophenyl)-6-phenyl1,3,4,6a-tetrahydroazireno[1,2-a]pyrazine 88 (Ar is 4-NO2C6H4) were mentioned in [88, 112]. In contrast to bases becoming blue in the light, the photoinduced form of the salts is red. Orlov et al. [112] explained this by a different electrondensity distribution in the photoinduced form. 46). 46 32 1 Three-Membered Azaheterocycles fused aziridines in the crystalline state is similar to a cycloaddition reaction where a reversible aziridine ring opening gives rise to the colored azomethine ylides.

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