A remarkable addition effect of bases, like AcOK, was observed in the radicaladdition of cyanoacetates to alkenes catalyzed by a Mn(II)/Co(II)/O2 redox system. Thus, a carbon radical from ethyl cy...
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.
Anodic oxidation in a solution containing a variety of olefins and a small amount of Mn(OAc)2.4H2O brought about Mn+3-mediated carbon-carbon bond formation, such as efficient carboxymethylation of styrene derivatives to the corresponding gamma-aryl-gamma-butyrolactones, and selective coupling of active methylene compounds with non-activated monoolefins, unconjugated dienes or 5-arylpent-1-enes.
Hajek, Milan; Malek, Jaroslav, Collection of Czechoslovak Chemical Communications, 1980, vol. 45, # 7, p. 1940 - 1949