α-CF3-Substituted Phosphorus Containing Analogs of α-Amino Acids. Novel Six- and Seven-Membered α-Amino Phosphonates via Ring Closing Metathesis with LnRu=C=C=CR2 Precatalyst - Osipov, Sergey N; Artyushin, Oleg I; Kolomiets, Alexey F; Bruneau, Christian; Dixneuf, Pierre H (Synlett, 2000)