Two complementary strategies for the synthesis of optically active fluorine-containing building blocks have been probed. The first strategy involves either the enzymatic resolution of fluorinated ?,?-disubstituted-?-amino acid amides, or the asymmetric hydrogenation
of fluorinated dehydroamino acids. The second strategy involves the transition metal-catalyzed introduction of fluorine-containing substituents onto olefin- or acetylene-containing ?-H-?-amino acids. These amino acids in turn are made optically active by enzymatic resolution of
the corresponding amides.
两种互补的策略用于合成含氟光学活性构建块已经被探索。第一种策略涉及对氟化的?,?-二取代-?-氨基酸酰胺进行酶解析,或对氟化脱氢氨基酸进行不对称氢化。第二种策略涉及过渡金属催化引入含氟取代基到含烯烃或乙炔的?-H-?-氨基酸上。这些氨基酸通过对应酰胺的酶解析而变得具有光学活性。