Ontology type: schema:ScholarlyArticle
2007-04
AUTHORSS. V. Galiullina, V. M. Zakharova, G. P. Kantin, V. A. Nikolaev
ABSTRACT3,4,6-Trisubstituted pyridazines were synthesized from fluoroalkyl-containing diazo keto esters in three steps along two different reaction sequences: (1) Wittig, Staudinger, and diaza-Wittig and (2) Staudinger, Wittig, and diaza-Wittig. According to the first of these with the initial Wittig reaction, the yield of the target 4-fluoroalkyl-substituted pyridazines is almost twice as large as in the reaction sequence involving the corresponding N-phosphanylidene derivatives as intermediates. In both sequences, the final steps (synthesis of vinylphosphazenes and the subsequent diaza-Wittig reaction) occurred as a tandem process, and intermediate vinylphosphazenes could not be isolated. Non-fluorinated diazo keto esters and the respective phosphazenes failed to react with alkoxycarbonylmethylidene(triphenyl)phosphoranes under the same conditions. More... »
PAGES607-614
http://scigraph.springernature.com/pub.10.1134/s1070428007040203
DOIhttp://dx.doi.org/10.1134/s1070428007040203
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