Formation and structure of 1-Amino-4-methyl-4-(4-methyl-5-phenyl-1<i>H</i>-pyrazol-3-ylamino)-3-phenyl-4,5-dihydro-1<i>H</i>-pyrazol-5-one
作者:Donato Donati、Stefania Fusi、Fabio Ponticelli
DOI:10.1002/jhet.5570350120
日期:1998.1
compound 3 was obtained during the rearrangement of isoxazol-5-yl hydrazine 1 to 1-aminopyrazolone 2 at 115°. X-ray analysis of the corresponding benzylidene derivative allowed us to achieve the structure assignment.
Addition/Cycloaddition of Acetylenedicarboxylates to Open-Chain or Cyclic Amino Carbonyl Compounds
作者:Giacomo Guerrini、Fabio Ponticelli
DOI:10.1002/ejoc.201000371
日期:——
Some new, interesting, and unknown heterocyclic rings and open-chain molecules have been obtained with ease and under mild conditions by reaction of a wide range of amino carbonyl compounds with acetylenic esters. The reactivity is highly dependent on the substituents and their positions in the starting material, which can be either cyclic (pyrazolones) or open-chain compounds.