P-Chiral phosphines are organophosphorus compounds of the formula PRR′R″, where R, R′, R″ = H, alkyl, aryl, etc. They are a subset of chiral phosphines...
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are not in the same plane, such as phosphorus in P-chiral phosphines (PRR′R″) and sulfur in S-chiral sulfoxides (OSRR′), because a lone-pair of electrons...
31 KB (3,629 words) - 15:21, 4 August 2024
Asymmetric hydrogenation (section Phosphine ligands)
the olefin, fixing the stereochemistry. Note that only part of the chiral phosphine ligand is shown for the sake of clarity. Quadrant model for asymmetric...
64 KB (6,355 words) - 10:03, 21 August 2024
Baylis–Hillman reaction (section Chiral auxiliaries)
a Lewis acid cocatalyst was required to accelerate the reaction. P-Chiral phosphines have been investigated. Simple diamines can also be employed as MBH...
24 KB (2,788 words) - 20:45, 22 July 2024
Organophosphine (redirect from Phosphines)
acrylonitrile: PH3 + 3 CH2=CHZ → P(CH2CH2Z)3 (Z = NO2, CN, C(O)NH2) Tertiary phosphines of the type PRR′R″ are "P-chiral" and optically stable. From the...
16 KB (1,699 words) - 02:29, 19 June 2024
optically stable (enantiomers racemize rapidly at room temperature), but P-chiral phosphines are. Appropriately substituted sulfonium salts, sulfoxides, arsines...
9 KB (918 words) - 15:34, 13 February 2024
phosphorus. With four different substituents (O, OH, H, R) they are chiral. The primary phosphine oxides subject to tautomerization, which leads to racemization...
11 KB (1,173 words) - 16:18, 27 May 2024
Enantioselective synthesis (redirect from Chiral ligand)
the achiral triphenylphosphine ligands in Wilkinson's catalyst with chiral phosphine ligands. This experimental catalyst was employed in an asymmetric hydrogenation...
41 KB (4,726 words) - 05:21, 27 May 2024
Homochirality (redirect from Chiral transmission)
Homochirality is a uniformity of chirality, or handedness. Objects are chiral when they cannot be superposed on their mirror images. For example, the left...
40 KB (5,098 words) - 04:02, 15 August 2024
Ohyun. "Phosphine-Catalyzed Annulations and Their Applications". {{cite journal}}: Cite journal requires |journal= (help) "Kwon Phosphines: P-Chiral Monodentate...
5 KB (544 words) - 22:09, 12 October 2023