Base-Promoted One-Pot Four-Component Domino Strategy Involving Aldehydes and Ketones to Access Multifunctionalized...

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Synthetic Chemistry

Background:

• Multifunctionalized dihydropyridinones are important pharmaceutical scaffolds.
• Existing synthesis routes often require multiple steps, limiting efficiency.
• Developing shorter, one-pot methods for dihydropyridinone synthesis is a key challenge.

Purpose of the Study:

• To establish a novel, efficient one-pot four-component reaction for dihydropyridinone synthesis.
• To shorten the synthetic route compared to traditional multi-step processes.
• To provide rapid access to diverse dihydropyridinone derivatives and their pyridine analogs.

Main Methods:

• A [1 + 2 + 1 + 2] four-component domino cyclization strategy was employed.
• Commercially available aldehydes and ketones were used as starting materials.
• Meldrum's acid and ammonium acetate (NH4OAc) served as key reagents.

Main Results:

• Successfully synthesized over 110 examples of dihydropyridinones in a single pot.
• The reaction utilizes inexpensive additives and readily available starting materials.
• The synthesized dihydropyridinones can be further converted into trisubstituted and tetrasubstituted pyridines.

Conclusions:

• The discovered domino cyclization offers a significantly shortened and efficient route to dihydropyridinones.
• This method facilitates rapid access to valuable heterocyclic compounds for pharmaceutical applications.
• The transformation provides a versatile platform for generating diverse dihydropyridinone and pyridine structures.