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Solid-phase synthesis of an alkylaminobenzanilide library
Moustafa El-Araby1, Helen Guo, Richard S Pottorf
13-Dimensional Pharmaceuticals, Inc., 8 Clarke Drive, Cranbury, New Jersey 08512, USA.
Journal of Combinatorial Chemistry
|September 14, 2004
Summary
Researchers synthesized a large library of benzanilides using solid-phase chemistry. This method efficiently creates diverse chemical structures for potential drug discovery and development.
Area of Science:
- Organic Chemistry
- Medicinal Chemistry
- Solid-Phase Synthesis
Background:
- Solid-phase synthesis offers advantages for combinatorial library generation.
- Benzanilides represent a privileged scaffold in medicinal chemistry.
- Efficient methods are needed to access diverse benzanilide derivatives.
Purpose of the Study:
- To develop and optimize a solid-phase synthesis strategy for 2- and 3-substituted benzanilides.
- To create a large, diverse library of benzanilide compounds.
- To establish a robust methodology for generating chemical libraries.
Main Methods:
- Optimization of aniline attachment to formyldimethoxyphenyl (FDMP) resin via reductive amination.
- Acylation of resin-bound anilines with substituted nitrobenzoyl chlorides.
- Reduction of nitro groups and subsequent alkylation with aromatic/heteroaromatic aldehydes using sodium triacetoxyborohydride (NaBH(OAc)3).
- Cleavage of final products from the resin using trifluoroacetic acid.
Main Results:
- Successful synthesis of a 10,800-member library of 2- and 3-substituted benzanilides.
- Demonstrated efficiency and broad applicability of the optimized solid-phase methodology.
- High-quality library generation suitable for screening.
Conclusions:
- The developed solid-phase approach provides an efficient route to diverse benzanilide libraries.
- This method is valuable for accelerating drug discovery efforts.
- The synthesized library offers a rich resource for identifying novel bioactive compounds.