Carbenic reactions of 4-diazo-4h-imidazole with benzene derivatives
β Scribed by T.J. Amick; H. Shechter
- Book ID
- 104218246
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- French
- Weight
- 273 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
The electrophilic behavior of 4H-imidazolylidene is greatly modified by coordinating groups in benzene derivatives undergoing substitution. Carbenes (Y2C:) react with benzenes (C6H5Z) to give (1) bicyclo[4.l.O]heptadienes (i) which may convert to other bicyclo[4.l.O]heptadienes (;I), cycloheptatrienes (2) and their re-
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Irradiation of 4-diazo-4H-imidazole (1) in an argon matrix at 10 K at a wavelength of Ξ» = 313 nm leads to rapid loss of nitrogen and the formation of 4H-imidazol-4-ylidene (2). Upon photoexcitation of 4H-imidazol-4-ylidene (2) at wavelengths longer than 570 nm, the ring-opened carbene S-6 can The f
Amino-I H-imidazole-4-carboxamide hydrochloride has been converted into a series of new, potentially biologically active N6-substituted 2-azaadenines 5 via 4-diazo-4H-imidazole-5-carbonitrile (1) which was coupled with primary amines to give 5 in 11 -78% yield. Further, some I-substituted 2-azahypox