Access to 1‐Phospha‐2‐azanorbornenes by Phospha‐aza‐Diels–Alder Reactions
作者:Peter Wonneberger、Nils König、Fabian B. Kraft、Menyhárt B. Sárosi、Evamarie Hey‐Hawkins
DOI:10.1002/anie.201811673
日期:2019.3.4
phospha‐aza‐Diels–Alder reaction between an activated electron‐poor imine and 2H‐phospholes yields 1‐phospha‐2‐azanorbornenes in a highly chemoselective and moderately diastereoselective reaction. The intermediate 2H‐phospholes, which act as dienes, are formed in situ from the corresponding 1H‐phospholes. Theoretical calculations confirm that the phospha‐aza‐Diels–Alder reaction is of normal electron
obtained the corresponding 2,2′-bis-(1-phosphanorbornadienyl) (BIPNOR) with twochiral, non-racemisable, phosphorus atoms at the bridgeheads. The pure enantiomers of BIPNOR appear to be efficient ligands in asymmetric hydrogenation of CC and CO double bonds.
2-(2′-pyridyl) phosphaferrocenes and analogues: a new type of chelating ligands with planar chirality and π-acceptor phosphorus centres
作者:Bernard Deschamps、Louis Ricard、François Mathey
DOI:10.1016/s0022-328x(97)00052-1
日期:1997.12
affords the 2-(2′ pyridyl)-3,4-dimethylphosphaferrocene (2) in 65% yield. This compound behaves as a π-acceptor-σ-donor P,N-chelating ligand towards W(O) and Cu(I). The W(CO)4 complex 5 has been characterized by X-ray crystal structure analysis. Some strain within the chelate is obvious from the P-W-N angle of 73°. The analogous 2-(8′-quinolyl)-3,4-dimethylphosphaferrocene (10) and 2-(2′-pyridyl)-3,4-d
Asymmetric Phospha-Diels-Alder Reaction: A Stereoselective Approach towards P-Chiral Phosphanes through Diastereotopic Face Differentiation
作者:Tobias Möller、Menyhárt B. Sárosi、Evamarie Hey-Hawkins
DOI:10.1002/chem.201203671
日期:2012.12.21
Old principles, new chemistry: A facile stereoselective synthesis of P‐chiral phosphanes is described in which the principle of enantiotopic and diastereotopic facedifferentiation used in carbon chemistry is extended to a phosphorus atom in a planar environment, that is, 2H‐phospholes.