Synthesis of fully substituted pyrimidines

Area of Science:

• Organic Chemistry
• Synthetic Chemistry
• Heterocyclic Chemistry

Background:

• Pyrimidine derivatives are important scaffolds in medicinal chemistry and materials science.
• Efficient synthesis of highly substituted pyrimidines remains a challenge.

Purpose of the Study:

• To develop a novel and efficient synthetic strategy for fully substituted pyrimidine derivatives.
• To introduce an oxy-functionalized acetate chain onto the pyrimidine ring.

Main Methods:

• Utilized a coupled domino reaction strategy.
• Employed amidines as the nitrogen source.
• Activated skipped diynes served as electrophilic partners.

Main Results:

• Successfully synthesized fully substituted pyrimidine derivatives with an oxy-functionalized acetate chain.
• The domino strategy involved two consecutive aza-Michael additions to form the heterocycle.
• A subsequent [H]-shift and [3,3]-sigmatropic rearrangement led to aromatization.

Conclusions:

• The described domino reaction offers a versatile and efficient route to complex pyrimidine structures.
• This approach provides a valuable tool for accessing novel functionalized pyrimidine derivatives for various applications.