Hydrogenolysis involves treating the N-arylsulfonyl-protected amino acid with hydrogen gas (H2) in the presence of a suitable catalyst, typically a metal catalyst like palladium on carbon (Pd/C) or platinum (Pt). The hydrogen gas reduces the arylsulfonyl group to an amine, while leaving the hydroxy group intact. This method is mild and selective, making it a preferred choice for deprotection.
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L-Threonine, N-[[4-(1-methylethyl)phenyl]sulfonyl]-
Ethyl (+/-)-(E)-(4R*,5S*)-5-hydroxy-4-methyl-5-phenyl-2-pentenoate
1,3-dihydro-3-methyl-2-phenylmethyl-2H-isoindole-1-one
