In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called A Mild One-Pot Reduction of Phosphine(V) Oxides Affording Phosphine(III) and Their Metal Catalysts, published in 2021-03-22, which mentions a compound: 1663-45-2, mainly applied to one pot reduction phosphine oxide chlorodisilane reducing reagent oxalylchloride; phosphine derivative transition metal complex preparation; crystal structure chlorophosphonium azolium salt; mol structure chlorophosphonium azolium salt, Recommanded Product: 1,2-Bis(diphenylphosphino)ethane.
The metal-free reduction of a range of phosphine(V) oxides employing oxalyl chloride as an activating agent and hexachlorodisilane as reducing reagent was achieved under mild reaction conditions. The method was successfully applied to the reduction of industrial waste byproduct PPh3(V) oxide, closing the P cycle to cleanly regenerate PPh3(III). Mechanistic studies and quantum chem. calculations support the attack of the dissociated chloride anion of intermediated phosphonium salt at the Si of the disilane as the rate-limiting step for deprotection. The exquisite purity of the resultant phosphine(III) ligands after the simple removal of volatiles under reduced pressure circumvents laborious purification prior to metalation and has permitted the facile formation of important transition metal catalysts.
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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis