Abstract:Three new derivatives of methoxyphenyl-substituted bis(picolyl)phosphines 3-5, the CH 2 TMS substituted bis(picolyl)phosphine (6) and related phosphine oxides 2b-5b have been synthesized. Syntheses were accomplished by reacting the corresponding dichlorophosphines with picolylTMS (7). An improved synthesis of most of the starting materials is also presented and enables increased ligand yields in all cases. The new bis(picolyl)phosphines and phosphine oxides are extensively