A compound comprising a substituent of the formula (II) is disclosed as an HIV protease inhibitor. Intermediates for making such compounds and processes for making such intermediates are also disclosed.
This work demonstrates that significant higher yields and shorter reaction times in the Perkin synthesis of cinnamic acids are obtained in all cases investigated, when sodium acetate is replaced by caesium acetate. The caesium variant of the Perkin reaction described here should therefore be generally preferred.