Synthesis of 3–aryl 3–hydroxyisoindolinones by the Addition of Grignard and Organolithium Reagents to Phthalimides

Title:Synthesis of 3–aryl 3–hydroxyisoindolinones by the Addition of Grignard and Organolithium Reagents to Phthalimides

Volume: 21 Issue: 14

Author(s): Danijel Glavac, Irena Dokli and Matija Gredicak*

Affiliation:

• Division of Organic Chemistry and Biochemistry, Ruder Boskovic Institute, Bijenicka c. 54, Zagreb,Croatia

Keywords: 3–hydroxyisoindolinones, Grignard reaction, organolithium reaction, phthalimide, organometallic addition.

Abstract: Background: The 3-substituted 3-hydroxyisoindolinone motif is common to a variety of compounds with potent biological activities. In recent years, they have also been increasingly used as substrates in various asymmetric transformations. Current methods for their preparation either do not tolerate wide range of functional groups, or yield 3–hydroxyisoindolinones as N–substituted products, which makes them inapplicable as substrates for the asymmetric transformations.

Objective: Aim of this study was a detailed examination of the synthesis of 3–substituted 3– hydroxyisoindolinones comprising various functional groups and unsubstituted phthalimide nitrogen.

Method: Grignard and organolithium reagents were employed as nucleophiles for the synthesis of 3– substituted 3–hydroxyisoindolinones under various reaction conditions.

Results: Phenyl substituents with electron donating groups are easily introduced by employing a Grignard reaction, while electron–poor arenes require a lithium exchange or direct lithiation strategy. The protocols are tolerant of various functional groups on the nucleophile, and a wide range of 3–hydroxyisoindolinones were afforded in good to excellent yields.

Conclusion: Simple and inexpensive method for the synthesis of 3-substituted 3-hydroxyisoindolinone has been developed. By tweaking the reaction conditions, described protocols are tolerant of a wide range of functional groups, and yield 3–substituted isoindolinone alcohols with unsubstituted phthalimide nitrogen.

Cite this article as:

Glavac Danijel, Dokli Irena and Gredicak Matija*, Synthesis of 3–aryl 3–hydroxyisoindolinones by the Addition of Grignard and Organolithium Reagents to Phthalimides, Current Organic Chemistry 2017; 21 (14) . https://dx.doi.org/10.2174/1385272821666170222100150

DOI https://dx.doi.org/10.2174/1385272821666170222100150	Print ISSN 1385-2728
Publisher Name Bentham Science Publisher	Online ISSN 1875-5348