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Updated: Jan 4, 2026
Enzymatic Cascade Reactions for the Synthesis of Chiral Amino Alcohols from L-lysine
Published on: February 16, 2018
Synthesis of Sterically Congested 2,2'-Bi(Adamantyl)-Based Alcohol and Amines
Yumeela Ganga-Sah1, Daniel B Leznoff1, Andrew J Bennet1
1Department of Chemistry , Simon Fraser University , 8888 University Drive , Burnaby , British Columbia V5A 1S6 , Canada.
Abstract:
Sterically congested chiral alcohol and amines have gained tremendous attention in the design of asymmetric catalysts. Herein, the synthesis of a sterically congested bis-adamantane framework-based chiral alcohol, (1R,2S,3S,4R)-4-(2-adamantyl)adamantan-2-ol, and amine, (1R,2S,3S,4R)-4-(2-adamantyl)adamantan-2-amine, is described. Access to these sterically encumbered compounds is found via the preparation of an enantioenriched 4-adamantyladamantan-2-one intermediate, which was synthesized in 6 steps from adamantan-2-one. The key step involved enzyme-catalyzed ester hydrolysis in giving unsaturated alcohol with an enantiomeric excess of >95%. This adamantylidene adamantanol was subjected to an acid-catalyzed intramolecular [1,4] shift to give the key chiral intermediate without racemization. This ketone intermediate was transformed into the target compounds via reduction and reductive amination protocols.
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