Practical Asymmetric Synthesis of (R)-(-)-Carnitine Catalyzed by (2R,4R)-4-(Dicyclohexylphosphino)-2-(di-3,5-xylylphosphinomethyl)-N-methyl-1-pyrrolidinecarboxamide-Rhodium Complex1 - Takeda, Hideo; Hosokawa, Shigeki; Aburatani, Masakazu; Achiwa, Kazuo (Synlett, 1991)