A new P-chiral aminophosphine ligand containing a 2,2′-coupled pyrrolidine–phospholane ring system. Synthesis and coordination properties with rhodium(I) and iridium(I) fragments
Abstract
A new approach to the synthesis of chiral P,N-ligands containing a stereogenic phosphorus atom is reported; the synthesis, characterization and coordination properties of (PR, 2R, 3R, 2′R, 3′S, 4′S) 2[2′(3′,4′-di-tert-butoxy-1′-methyltetrahydropyrrolyl)]-3-methoxy-1-phenyltetrahydrophosphole (P*-N-1), which contains a stereogenic phosphorus in addition to five contiguous stereocentres in the ligand backbone; compound P*-N-1 represents the first example of a new class of chiral P,N-ligands with the heteroatoms incorporated in two 2,2′-coupled pyrrolidine–phospholane rings.
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