A new heterocyclization in the series of acetylenic derivatives of anthraquinone |
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| Authors: | M. S. Shvartsberg I. D. Ivanchikova L. G. Fedenok |
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| Affiliation: | (1) Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 3 ul. Institutskaya, 630090 Novosibirsk, Russian Federation;(2) Novosibirsk State University, 2 ul, Pirogova, 630090 Novosibirsk, Russian Federation |
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| Abstract: | 2-Alkynyl-l-amino-9,10-anthraquinones react with HNO2 in a mixture of dilute HCl and dioxane at 20 °C to give I , 1-dichloroalkyl- IH-3-naphto[2,3-g]indazole-6,1 1 -diones. This reaction differs from the known cylization ofortho-alkynylbenzenediazonium salts involving the formation of a pyridazine ring (the Richter synthesis of 4-hydroxy- and 4-halocinnolines).Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1803–1807, July, 1996, |
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| Keywords: | the Richter reaction 2-alkynyl-l-amino-9,10-anthraquimones cyclization 3-substituted lH-naphtho[2,3-g]indazolc-6,ll -thanes |
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