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Beilstein J. Org. Chem. 2015, 11, 313–322, doi:10.3762/bjoc.11.36
Graphical Abstract
Scheme 1: Fenchyl-based ligands used as building blocks for phosphorous ligands or organoaluminum reagents.
Scheme 2: Reaction of BIFOP–Cl (1) to BIFOP–(O)H (2) and of O–BIFOP–Cl (3) yielding O–BIFOP–H (4), O–BIFOP–(O...
Figure 1: 31P NMR (125 MHz, CDCl3) of O–BIFOP–Cl (3, δ = 161.9) after the addition of 1 equiv H2O and formati...
Figure 2: X-ray crystal structure of diphenyl ether-2,2’-biscyclofenchene 7. Ellipsoids are shown with 50% pr...
Scheme 3: Proposed mechanism for the formation of diphenyl ether-2,2’-biscyclofenchene 7 through stabilizatio...
Figure 3: 31P NMR (125 MHz, CDCl3) of O–BIFOP–H (4, δ = 152.5) adding O2 after a) 5 min; b) 15 min; c) 120 mi...
Figure 4: X-ray crystal structure of BIFOP-Cl 1. Ellipsoids are shown with 50% probability [15].
Scheme 4: The different backbones provoke different reactivities due to tighter encapsulation of the P–Cl uni...
Figure 5: X-ray crystal structure of O-BIFOP-Cl (3). Ellipsoids are shown with 50% probability.
Figure 6: Transition state structure for the reaction of BIFOP–Cl (1) with water (BP86/def-SV(P)).
Figure 7: Transition state structure for the reaction of O-BIFOP–Cl (3) with water (BP86/def-SV(P)).