Synthesis of organophosphorus compounds via silyl esters of phosphorous acids
作者:Kamyar Afarinkia、Charles W. Rees、John I.G. Cadogan
DOI:10.1016/s0040-4020(01)87899-6
日期:1990.1
The addition of trimethylsilyloxy phosphorus (III)derivatives generated in situ to imines at room temperature provides a mild selective and high yielding route to α-aminoalkylphosphorate and α-aminoalkylphenylphosphinate esters. Isocyanates and carbodiimides react similarly to give phosphonoureas and phosphonoguarnidines respectively aldehydes and ketones are much less reactive and cyanides are inert
Silyl Phosphites. XVIII. Versatile Utility of α-(Trimethylsilyloxy)alkylphosphonates as Key Intermediates for Transformation of Aldehydes into Several Carbonyl Derivatives
作者:Mitsuo Sekine、Masashi Nakajima、Akiko Kume、Akio Hashizume、Tsujiaki Hata
DOI:10.1246/bcsj.55.224
日期:1982.1
trimethylsilyl phosphite (DTMSP) with aldehydes were converted, by treatment with lithium diisopropylamide (LDA) followed by the successive alkylation and alkalinehydrolysis, to carbonyl derivatives involving aldehydes, unsymmetrical ketones, β,γ-unsaturated ketones, and carboxylic acids. β-Substituted carboxylic esters and γ-substituted lactones were prepared by use of the carbonyl addition compounds of DTMSP
Development of a New Class of Chiral Phosphorus Ligands: P-Chirogenic Diaminophosphine Oxides. A Unique Source of Enantioselection in Pd-Catalyzed Asymmetric Construction of Quaternary Carbons
phosphorus compounds have been successfully applied to Pd-catalyzed asymmetric construction of tertiary and quaternary carbons. The actual ligand structure was the trivalent phosphorus species 17, which was generated in situ by BSA-induced P(V) to P(III) transformation of 6, the preligand. Detailed mechanistic studies, including asymmetric amplification and initial rate kinetics, revealed that complex 18
Chlorosilane-Catalyzed Coupling of Hydrogen Phosphine Oxides with Acyl Chlorides Generating Acylphosphine Oxides
作者:Jian-Qiu Zhang、Li-Biao Han
DOI:10.1021/acs.orglett.0c01384
日期:2020.6.19
report a new method for the synthesis of acylphosphineoxides by the direct coupling of hydrogen phosphine oxides and acyl chlorides mediated by chlorosilanes. This new protocol is greener and safer, because it precludes the generation of volatile haloalkanes and the use of oxidants employed in the conventional methods. Moreover, moisture-unstable acylphosphineoxides that are difficult to prepare via the
Reductive conversion of phosphoryl P(O) compounds to trivalent organophosphines R3P
作者:Jian-Qiu Zhang、Li-Biao Han
DOI:10.1016/j.tetlet.2021.152870
日期:2021.3
By introducing trimethylsilyl chloride (TMSCl), the pentavalent phosphoryl P(V) compounds such as triphenylphosphine oxides, secondary phosphine oxides etc., were readily converted to the corresponding R2P(OTMS) intermediates, that can further react efficiently with an electrophile R’X or with a nucleophile R’Li to produce the corresponding trivalent phosphines R2PR’. Chiral phosphines could also be