aromatic carboxylic acids. The extension of the scope of the reaction to eight Boc-protected amino acids is also described, the products being obtained in moderate to good yields. A preliminary screening of these new potential organocatalysts was carried out for the aldolization of isatin.
The synthesis of two derivatives of isosorbide containing an amine group, 6-amino-6-deoxy-O-3-methyl-isosorbide and 6-amino-O-3-benzoyl-6-deoxy-isosorbide, has been achieved. These compounds provide scope for the introduction of additional groups via their amino functions and thereby can provide access to novel isosorbide derivatives that can be screened for biological activity.