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
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
GRAPHICAL ABSTRACT ABSTRACT A concise synthesis of thiophosphate, phenylthiophosphonate, and diphenylthiophosphinate esters bearing a 28a-homolupane residue is reported. The new triterpenes were obtained from the readily available 3-O-acetylichopanol by a nucleophilic substitution of the corresponding mesylate with thiocyanate ion followed by a Michaelis–Arbuzov reaction. These results open the way