128174-79-8Relevant academic research and scientific papers
Benzocyclobutenes Part 8. Geometrical Isomerism of Arylhydrazones of Benzocyclobutene-1,2-dione
Cracknell, Mark Edward,Goodland, Michael Charles,McOmie, John Frederick William
, p. 965 - 966 (1983)
Four mono(arylhydrazone)s of benzocyclobutene-1,2-dione (BBD) have been prepared in which the aryl group is 2,4-dinitrophenyl, 4-bromophenyl, phenyl, and 4-nitrophenyl.The first three have been separated into their E- nd Z-isomers whose configurations are assigned on the basis of spectra and Rf values.Improvements in the preparation of BBD from 1,2-dibromo-1,2-dihydrobenzocyclobutene are described.
A novel method for the synthesis of 1(2H)-phthalazinones using silica-supported perchloric acid
Heravi, Majid M.,Baghernejad, Bita,Oskooie, Hossein A.
experimental part, p. 351 - 354 (2009/07/19)
A simple and efficient synthesis of 1(2H)-phthalazinone derivatives was achieved via reaction of phthalaldehydic acid and various phenyl hydrazines in acetonitrile using HClO4-SiO2 as a catalyst in very good yields.
A novel method for the synthesis of 1(2H)-phthalazinone derivatives using heteropolyacids as heterogeneous and recyclable catalysts
Heravi, Majid M.,Baghernejad, Bita,Oskooie, Hossein A.,Bamoharram, Fatemeh F.
experimental part, p. 375 - 384 (2009/05/31)
A simple and efficient synthesis of 1(2H)- phthalazinone derivatives was achieved via a reaction of phthalaldehydic acid and various phenyl hydrazines in CHCl3 in the presence of a catalytic amount of different heteropolyacids (HPAs) in very good yields.
A trans-Folded Alkene System: Synthesis, Structure and Isomerization of 2,2'-Diaryl-1,1'-bi(1,2-dihydrophthalazinylidenes)
Butler, Richard N.,Gillan, Ann M.,Lysaght, Fiona A.,McArdle, Patrick,Cunningham, D.
, p. 555 - 564 (2007/10/02)
A series of 2,2'-diaryl-1,1'-bi(1,2-dihydrophthalazinylidenes) have been synthesized from 1-hydroxy-2-aryl-1,2-dihydrophthalazines.An X-ray crystal structure showed relief of strain in these new ylidenes by a trans-folding of the alkene linkage.The mechanism of their formation was probed with additives such as sulphur, N-phenylmaleimide, and dimethyl acetylenedicarboxylate which interacted with intermediates in the reaction and gave further interesting new ylidene structures.The mechanism of trans-cis isomerization of the biphthalazinylidenes was studied using 270 MHz 1 H-NMR spectroscopy to measure the kinetics and activation parameters for the isomerization.X-Ray crystal structures of the following compounds are reported: 2,2'(p-bromophenyl)-trans-1,1'-bi--4--1-phenyl-3,4-dihydropyrrole-2,5-dione, (10d); dimethyl 3-(2-phenyl-1,2-dihydrophthalazin-1-ylidene)-2-oxobutanedioate (11), and dimethyl 2-acetoxy-3-(2-phenyl-1,2-dihydrophthalazin-1-yl)but-2-ene-1,4-dioate (12).
