Poly condensed nitrogen heterocycles. V. Two novel ring systems: Pyrazolo[5,1-c]-1,2,4-thiadiazine and pyrazolo[3,4-c]-1,2-thiazine |
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Authors: | Enrico Aiello Salvatore Plescia Gaetano Dattolo |
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Abstract: | The title compounds were obtained by reaction of aminopyrazoles IV and VII with ω-acetophenonesulfonyl chloride (II, R = C6H5). In agreement with the general pattern of the distribution of electron density in the pyrazole nucleus, this work confirms that the position 4 of ring is the favoured site of electrophilic attacks. |
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