10.1055/s-2003-37649
The research focuses on the total synthesis of aspartyl protease inhibitors, specifically L-682,679, L-684,414, L-685,434, and L-685,458, which are hydroxyethylene dipeptide isosteres. These compounds are of significant interest due to their potential as inhibitors of aspartyl proteases, enzymes implicated in diseases such as HIV and Alzheimer's. The synthetic approach involves an allyltrichlorostannane coupling with α-amino aldehydes, followed by hydroboration, lactonization under TPAP conditions, lactone opening, and peptide coupling with the desired amine or dipeptide amide. The purpose of this research is to develop a practical and efficient synthetic method for these inhibitors, which could lead to a wide range of other dipeptide isosteres. The conclusions drawn from the research indicate that the synthetic methodology is effective and provides a foundation for further biological studies and the development of novel analogues. Key chemicals used in the process include allyltrichlorostannane, α-amino aldehydes, hydroxyethylene dipeptide isosteres, and various reagents for the peptide coupling and protection/deprotection steps.