A NOVEL METHOD FOR THE SYNTHESIS OF 1(2H)- PHTHALAZINONE DERIVATIVES USING HETEROPOLYACIDS AS HETEROGENEOUS AND RECYCLABLE CATALYSTS
作者:Majid M. Heravi、Bita Baghernejad、Hossein A. Oskooie、Fatemeh F. Bamoharram
DOI:10.1515/hc.2008.14.5.375
日期:2008.1
A simple and efficient synthesis of 1(2H)phthalazinone derivatives was achieved via a reaction of phthalaldehydicacid and various phenyl hydrazines in CHCI3 in the presence of a catalytic amount of different heteropolyacids (HPAs) in very good yields.
A novel method for the synthesis of 1(2<i>H</i>)-phthalazinones using silica-supported perchloric acid
作者:Majid M. Heravi、Bita Baghernejad、Hossein A. Oskooie
DOI:10.1002/jhet.77
日期:2009.3
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. J. Heterocyclic Chem., 46, 351 (2009).
Herein an efficient and simple protocol was developed for the synthesis of pyrazoles and phthalazin-1(2H)-ones from a common precursor hydrazines catalyzed by nickelchloride. The reactions proceeded in water at room temperature. The advantages of the protocol are that both the medicinally important scaffolds could be synthesized with low-cost catalyst, green solvent, relatively lower reaction time
Benzocyclobutenes Part 8. Geometrical Isomerism of Arylhydrazones of Benzocyclobutene-1,2-dione
作者:Mark Edward Cracknell、Michael Charles Goodland、John Frederick William McOmie
DOI:10.1246/bcsj.56.965
日期:1983.3
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- and 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
已经制备了苯并环丁烯-1,2-二酮 (BBD) 的四种单(芳基腙),其中芳基是 2,4-二硝基苯基、4-溴苯基、苯基和 4-硝基苯基。前三个已被分离为它们的 E 和 Z 异构体,其构型是根据光谱和 Rf 值分配的。描述了从 1,2-二溴-1,2-二氢苯并环丁烯制备 BBD 的改进。
Vinylene Carbonate as Latent Formylmethyl Surrogate: The Expediency of Ruthenium(II) Catalysis in Accessing Arylacetaldehydes, Arylacetates and Acetals
作者:Dolly David Thalakottukara、Thirumanavelan Gandhi
DOI:10.1002/ejoc.202300847
日期:2024.2.5
Herein, we report a Ru(II)-catalyzed additive controlled direct formylmethylation and sequential dehydrogenative esterification of phthalazinones to access arylacetaldehydes, arylacetates, and acetals using vinylene carbonate as a C2 synthon. The reaction mechanism is elucidated using various control experiments and confirmation of possible intermediates by mass spectrometry.