Regioselective Synthesis of Novel 4,4′-and 5,5′-bi-(1,2,4-triazole) Derivatives
作者:Ahmad M. Farag、Kamal M. Dawood、Nabila A. Khedr
DOI:10.3184/030823407x237876
日期:2007.8
A regioselective synthesis is reported of a series of polysubstituted 1,2,4-triazoles and 4,4′- and 5,5′-bi-(1,2,4-triazoles) via 1,3-dipolar cycloaddition reactions of nitrilimines with some aza- and diaza-butadiene derivatives.
2-(aryldiazenyl)pyrrolo[2,1-a]isoquinoline derivatives 8 (Scheme 2), whereas with C-(ethoxycarbonyl)hydrazonoyl chlorides 14, 2-(arylhydrazono)pyrrolo[2,1-a]isoquinoline-1-carbonitriles 16 were formed (Scheme 4). The structures of the products were established from their analytical and spectroscopic data and, in the case of 8b, by X-ray crystallography.
Chemical and Photochemical Studies on 1,8-Diaminonaphthalene
作者:asma Mahran、Sherif Ragab、Dalia Othman
DOI:10.21608/ejchem.2021.94861.4462
日期:2021.9.22
A novel series of naphthodiazepines 4a-e, 6 were synthesized through the reaction of 1,8-diaminonaphthalene 1 with either hydrazonoyl chlorides 2a-e, or bis-hydrazonoyl chloride 5, respectively. Moreover, new derivatives of thiazinoperimidine 9, triazoloperimidine 13 , and thiazoloperimidines 14,17 were produced upon the interaction of 1H-perimidine-2-thiol 7 with the reagents; epichlorohydrin, hydrazonoyl chloride 10, bis-hydrazonoyl chloride 5, and α-chloroacetoacetanilide 15, respectively. Additionally, the irradiation of 1,8-diaminonaphthalene 1 was accomplished at λ > 313 nm using a high-pressure mercury lamp in the presence of oxygen. All the products were characterized using spectroscopic and analytical techniques