Reduction of triple bonds

In terms of models for reduction of triple bonds, a series of isolated iron carbonyl clusters, which nicely show H-atom mobility, provides a... 

Reduction of triple bonds in compounds containing aromatic rings and functional groups is dealt with in the appropriate sections. 

T Reduction of triple bonds in PPEs to single bonds... 

Double bonds can be created by a number of available stereospecific reactions (E2 elimination, pyrolytic elimination, e.g. Cope, Chugaev reactions), stereoselective Wittig and related reactions, reduction of triple bonds, by cisitrans isomerisation of existing double bonds either photochemically or by wet chemistry, e.g. the Corey-Winter procedure. [17]... 

The synthesis of Z-alkenyl derivatives were carried out by partial reduction of triple bond with the Lindlar catalyst (route f). The fully saturated derivatives were obtained starting from the same alkynes by using palladium on charcoal as a catalyst (route g). 

The selective catalytic hydrogenation of 2-butyne-l,4-diol to ciJ-2-butene-l,4-diol over palladiiun represents a common situation involving a multifimctional conpound. Fortunately, the reduction of triple bonds is very selective over palladium [1,2]. Butenediol is an important chemical intermediate due to its use in the production of several insecticides and pharmaceuticals (i.e. endosulfan and vitamin B6). The use of supported palladium [3-8], Raney nickel [9] or nickel [10] catalyst has been reported for this reaction under relatively mild operating conditions. However, due to the possibility of several side reactions [3-4], the problem of selectivity towards c/r-butenediol becomes important. Over Pd/C, it was reported... 

Stereoselective reduction of triple bonds. Morris et al. have reported that zinc powder in 50% aqueous n-propanol at reflux reduces triple bonds to cis-double bonds stereoselectively. 

Pt or Pd catalysts on CaC03, poisoned by Pb (Lindlar s catalyst). They enable selective reduction of triple bonds to double bonds (Eq. 5-82). 

Reduction of Triple Bonds in PPEs Complexation of Triple Bonds in PPEs... 

Hydrogenation of double bonds, acid chlorides, aromatic nitro compounds, carbonyl groups, partial reduction of triple bonds, etc. 

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