New trifluoromethylated pyridines from functionalized<i>N</i><sup>1</sup>-acylacetamidrazones
作者:Maria Teresa Cocco、Cenzo Congiu、Valentina Onnis、Angela Maria Bernard、Pier Paolo Piras
DOI:10.1002/jhet.5570330637
日期:1996.11
Polyfunctionalized trifluoromethylpyridines 4, 5 were readily synthesized from trifluoroacetylvinyl ether 3, using N1-acylacetamidrazones 1,2 as starting material.
Reaction of<i>N</i><sup>1</sup>-acylacetamidrazones with trifluoroacetylvinyl ethers. Synthesis of new 4-trifluoromethyl- and 6-trifluoromethylpyridines
作者:Maria Teresa Cocco、Cenzo Congiu、Valentina Onnis、Angela Maria Bernard、Pier Paolo Piras
DOI:10.1002/jhet.5570340432
日期:1997.7
The reaction between N1-acylacetamidrazones 1 and enol ether 2 is described. Depending on the reaction conditions and on the substitution pattern of amidrazones 2-acylhydrazino-4-methyl-6-trifluoro-methylpyridines 3 and/or 2-acylhydrazino-6-methyl-4-trifluoromethylpyridines 4 were obtained.
reactivity of acetamidrazones I in strong basicity conditions was examined. When compounds I are reacted with equivalent quantities of α-haloketones in sodium alcoholate, the pyrrolidino[2,3-c]pyrazol-3-ones IV were obtained by intermediate formation of 1-acyl-3-amino-5-pyrazolones III.
检查了乙酰氨基dra酮I在强碱性条件下的反应性。当化合物I与等量的α-卤代酮在乙醇酸钠中反应时,通过中间形成1-酰基-3-氨基-5-吡唑啉酮III可获得吡咯烷并[2,3 - c ]吡唑-3-酮IV。
Cocco, Maria Teresa; Congiu, Cenzo; Onnis, Valentina, Journal of Heterocyclic Chemistry, 1991, vol. 28, # 3, p. 797 - 800
作者:Cocco, Maria Teresa、Congiu, Cenzo、Onnis, Valentina、Maccioni, Antonio
DOI:——
日期:——
Cocco, Maria Teresa; Congiu, Cenzo; Maccioni, Antonio, Journal of Heterocyclic Chemistry, 1992, vol. 29, # 6, p. 1631 - 1634
作者:Cocco, Maria Teresa、Congiu, Cenzo、Maccioni, Antonio、Onnis, Valentina