Me 3 P-catalyzed addition of hydrogen phosphoryl compounds P(O)H to electron-deficient alkenes: 1 to 1 vs 1 to 2 adducts
作者:Tian-Zeng Huang、Tieqiao Chen、Yuta Saga、Li-Biao Han
DOI:10.1016/j.tet.2017.10.070
日期:2017.12
Trimethyl phosphine was used as an efficient catalyst for the addition of P(O)-H compounds to electron-deficient alkenes. The addition reactions were generally conducted using a catalytic amount of Me3P under mild reaction conditions. Both 1 to 1 and 1 to 2 adducts were obtained.
PS-BEMP was used as a heterogeneous catalyst for the phospha-Michael addition of phosphorus nucleophiles to a variety of electron-poor alkenes. The addition reactions were generally performed with equimolar amounts of reagents under solvent free conditions. The protocol proved to be very efficient for the addition to aromatic, non-aromatic and cyclic ketones, giving good yields (78–85%) in all cases
Use of indium hydride (Cl2InH) for chemoselective reduction of the carboncarbon double bond in conjugated alkenes
作者:Brindaban C. Ranu、Sampak Samanta
DOI:10.1016/s0040-4039(02)01668-4
日期:2002.10
Indium hydride (Cl2InH) generated in situ from a combination of a catalytic amount of indium(III) chloride and sodium borohydride selectively reduces the carboncarbondoublebond in conjugatedalkenes such as α,α-dicyano olefins, α,β-unsaturated nitriles, cyano esters, cyanophosphonate, diesters and ketones.