Sp hydrogens

Jiang SP and Badwal SPS. Hydrogen oxidation at the nickel and platinum electrodes on yttria-tetragonal zirconia electrolyte. J Electrochem Soc 1997 144 3777-3784. 

Bile acids are C-24 to C-28 carboxylic acids with a steroid nucleus containing hydroxylic substituents and part or all of the side chain of 5 -cholestane (Fig. 1). The A/B ring junction is cis (Sp hydrogen) in the bile acids of most higher vertebrates, although A/B trans (alio) bile acids (5a hydrogen) occur in lower vertebrates (HIO). Bile acids do not occur in invertebrates. Most unconjugated bile acids have 24 carbon atoms with the basic structure of 5p-... 

Carbon(sp )-hydrogen bond functionahzation by means of rhodium-... 

Zn reagents with )3-sp hydrogens are capable of undergoing the coupling reaction without significant amounts of )3-elimination (equation 46) (111) and catdysts with the dppf ligand are particularly effective (112-114). 

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