K-10 effectively catalyzed the condensation and substitution reactions. The approach was based on the direct cyclization of phthalaldehydicacid and opianic acid with substituted hydrazines. The reactions provided excellent yields and high selectivities in very short time (5-35 minutes). phthalazinones - phthalaldehydicacid - opianic acid - hydrazines - montmorillonite K-10 - microwave heating
Palladium-Catalyzed Phthalazinone Synthesis Using Paraformaldehyde as Carbon Source
作者:Huamin Wang、Jinhui Cai、Huawen Huang、Guo-Jun Deng
DOI:10.1021/ol502498y
日期:2014.10.17
A palladium-catalyzed one-pot synthesis of phthalazinones from 2-halomethyl benzoates, paraformaldehyde, and aryl hydrazines is described. Various substituted phthalazinones were selectively obtained in good yields using paraformaldehyde as the cheap carbon source (CH).
Sustainable Ru(II)-Catalyzed ortho-C(sp2)–H Hydroxyalkylation of Phthalazinones Using Ethyl Glyoxalate: Access to α,α′-Arylcarboxy sec-Alcohols
作者:Thirumanavelan Gandhi、Alagumalai Ramkumar
DOI:10.1055/a-2114-5426
日期:2023.11
An operationally simple and expeditious protocol for Ru(II)-catalyzed ortho-C(sp2)–H hydroxyalkylation of phthalazinones using commercially available ethylglyoxalate in 2-Me-THF is reported. This greener approach involves the imine nitrogen on the phthalazinones as a directing group to effect the regioselective hydroxyalkylation. Ample examples of biologically relevant hydroxyalkylated phthalazinones
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.