AbstractThe deoxygenation of 1‐alkyl‐3‐methyl‐3‐phospholene 1‐oxides, which may be regarded as trialkyl phosphine oxides (R3PO), and the reduction of dialkyl‐phenylphosphine oxides (R2PhPO) and methyl‐diphenylphosphine oxide (MePh2PO) have been elaborated by applying user‐friendly silanes, such as tetramethyldisiloxane (>SiH–O–HSi<) and polymethylhydrosiloxane ((O–SiH)n) under solvent‐free, catalyst‐free, and microwave (MW)‐assisted conditions. New silanes of type Ar2SiH2, alkyl2SiH2, and Ar3SiH were also applied in a few cases. The reactivity of the phosphine oxides and the silanes could be mapped on the basis of our experimental data.
A “green” variation of the Hirao reaction: the P–C coupling of diethyl phosphite, alkyl phenyl-<i>H</i>-phosphinates and secondary phosphine oxides with bromoarenes using a P-ligand-free Pd(OAc)<sub>2</sub> catalyst under microwave and solvent-free conditions
作者:György Keglevich、Erzsébet Jablonkai、László B. Balázs
DOI:10.1039/c4ra03292f
日期:——
The P–C coupling of diethyl phosphite, alkyl phenyl-H-phosphinates, diphenylphosphine oxide and dialkylphosphine oxides with bromoarenes may be performed in the presence of a P-ligand-free Pd(OAc)2 catalyst and triethylamine undermicrowave-assisted (MW) and, in almost all cases, solvent-free conditions to afford diethyl arylphosphonates, alkyl diphenylphosphinates, aryldiphenylphosphine oxides and
CATALYSTS FOR THE PRODUCTION OF HYDROXY ETHER HYDROCARBONS BY VAPOR PHASE HYDROGENOLYSIS OF CYCLIC ACETALS AND KETALS
申请人:Devon Thomas James
公开号:US20120330067A1
公开(公告)日:2012-12-27
Catalyst compositions of palladium supported on alumina or zirconium oxide supports having low or no silicon dioxide contents and having a specific surface area or modified with alkali, alkaline earth, or phosphine oxide compounds are selective in a vapor phase hydrogenolysis reaction to convert cyclic acetal compounds and/or cyclic ketal compounds in the presence of hydrogen to their corresponding hydroxy ether hydrocarbon reaction products.
PRODUCTION OF HYDROXY ETHER HYDROCARBONS BY VAPOR PHASE HYDROGENOLYSIS OF CYCLIC ACETALS AND KETALS
申请人:Devon Thomas James
公开号:US20120330066A1
公开(公告)日:2012-12-27
A vapor phase hydrogenolysis reaction to convert cyclic acetal compounds and/or cyclic ketal compounds in the presence of hydrogen to their corresponding hydroxy ether hydrocarbon reaction products using a supported noble metal catalyst. The hydrogenolysis reaction can be carried out in the vapor phase and in the absence of a polyhydroxyl hydrocarbon co-solvent.
Selective Hydrogenation Catalyst and Methods of Making and Using Same
申请人:Cheung Tin-Tack Peter
公开号:US20100228065A1
公开(公告)日:2010-09-09
A composition comprising a supported hydrogenation catalyst comprising palladium and an organophosphorous compound, the supported hydrogenation catalyst being capable of selectively hydrogenating highly unsaturated hydrocarbons to unsaturated hydrocarbons. A method of making a selective hydrogenation catalyst comprising contacting a support with a palladium-containing compound to form a palladium supported composition, contacting the palladium supported composition with an organophosphorus compound to form a catalyst precursor, and reducing the catalyst precursor to form the catalyst. A method of selectively hydrogenating highly unsaturated hydrocarbons to an unsaturated hydrocarbon enriched composition comprising contacting a supported catalyst comprising palladium and an organophosphorous compound with a feed comprising highly unsaturated hydrocarbon under conditions suitable for hydrogenating at least a portion of the highly unsaturated hydrocarbon feed to form the unsaturated hydrocarbon enriched composition.
The reactivity of arylphosphine oxides under Bouveault-Blanc reaction conditions
作者:Ewelina Korzeniowska、Anna E. Kozioł、Elżbieta Łastawiecka、Anna Flis、Marek Stankevič
DOI:10.1016/j.tet.2017.07.004
日期:2017.8
makes use of the inexpensive sodium as the electron donor and an alcohol as the proton source, and provides an attractive alternative to reactions mediated by expensive transition metals. Under optimized conditions numerous mono- and diaryl substituted phosphine oxides were transformed into the corresponding mono- and dicyclohexyl-substituted phosphine oxides in good yields. Furthermore, the formation