Application of Organolithium and Related Reagents in Synthesis. Part 22<sup>1</sup>. Synthetic Strategies Based on Ortho-Aromatic Metallation. A Concise Regiospecific Conversion of Benzoic Acids into the 4-Pyridyl-2<i>H</i>-Phthalazin-1-Ones
作者:J. Z. Brzezinski、J. Epsztajn、A. D. Bakalarz、A. Lajszczak、Z. Malinowski
DOI:10.1080/00397919908085788
日期:1999.2
Abstract The synthesis of phthalazin-1-ones 6, 7, 8 via the reaction of 3-hydroxyisoindolin-l-ones 3, 4, 5 with hydrazine hydrate is described. Starting compounds 3, 4, 5 were regiospecifically prepared upon the lithiation (n-BuLi) of the benzanilides 1 and subsequently the reaction of the dilithiated anilides 2 with methyl pyridinecarboxylates.