Diverse Synthesis of 2H-Isoindole-Based Polycyclic Aromatic Compounds

Area of Science:

• Organic Chemistry
• Synthetic Chemistry

Background:

• Isoindoles are important heterocyclic compounds with diverse applications.
• Developing efficient synthetic routes to substituted isoindoles and their derivatives is crucial for medicinal chemistry and materials science.

Purpose of the Study:

• To develop a novel cascade reaction for the synthesis of 1,3-disubstituted N-aryl-2H-isoindoles.
• To explore the derivatization of these isoindoles into more complex nitrogen-containing polycycles.

Main Methods:

• A cascade reaction involving divinyl ethers (derived from 4-bromoisocoumarins) and substituted anilines in hexafluoroisopropanol (HFIP).
• The reaction proceeds via a ring-opening (addition-elimination) followed by a ring-closing (intramolecular nucleophilic substitution) mechanism.

Main Results:

• Successfully synthesized a range of 1,3-disubstituted N-aryl-2H-isoindoles.
• Demonstrated the derivatization of the synthesized 2H-isoindoles into high-order nitrogen-containing polycycles, including benzo[a]ullazines.

Conclusions:

• The developed cascade reaction offers an efficient and versatile route to N-aryl-2H-isoindoles.
• This methodology provides access to valuable, complex nitrogen-containing heterocyclic scaffolds for further chemical exploration.