Expanding Complex Morpholines Using Systematic Chemical Diversity

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Drug Discovery

Background:

• The morpholine heterocycle is a key structural motif in numerous bioactive compounds and FDA-approved drugs.
• The synthesis of complex, C-functionalized morpholine derivatives is an underexplored area in organic chemistry.

Purpose of the Study:

• To expand the chemical diversity of morpholine scaffolds through regiochemical and stereochemical variation.
• To synthesize a collection of methyl-substituted morpholine acetic acid esters.

Main Methods:

• Employed systematic chemical diversity (SCD) principles.
• Utilized enantiomerically pure amino acids and amino alcohols as starting materials.
• Generated 24 distinct substituted morpholine compounds.

Main Results:

• Successfully synthesized 24 diverse C-substituted morpholines.
• Achieved systematic variation in both regiochemistry and stereochemistry (relative and absolute).
• Produced methyl-substituted morpholine acetic acid esters.

Conclusions:

• The synthesized morpholine derivatives are valuable for fragment screening.
• These compounds can serve as versatile building blocks in medicinal chemistry and library synthesis.
• This work expands the accessible chemical space of morpholine scaffolds.