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
Ru(<scp>II</scp>)‐Catalyzed Selective C—H Alkynylation of Isoquinolones, Quinazolones and Phthalazinones with Bromoalkynes
作者:Quan‐Jian Luo、Han‐Chi Wang、Jing Zhang、Jin‐Heng Li、Bo Sun
DOI:10.1002/cjoc.202400107
日期:——
A new, selective Ru(II)-catalyzed alkynylation reaction of isoquinolones, quinazolones and phthalazinones with readily available bromoalkynes has been developed. This reaction enables the selective construction of a new C(sp2)-C(sp) bond through C—Hactivation and C—Br functionalization, and offers an effective and selective route to synthesizing highly valuable alkynylated isoquinolone, quinazolone
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.