In heterogeneous catalysis, the catalyst is in a different phase from the reactants. name: (S)-( )-5-Oxo-2-tetrahydrofurancarboxylic Acid, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 21461-84-7, name is (S)-( )-5-Oxo-2-tetrahydrofurancarboxylic Acid. In an article，Which mentioned a new discovery about 21461-84-7
Starting from Boc-protected tryptamine and (S)-tetrahydro-5-oxo-2- furancarboxylic acid, facile enantioselective total synthesis of desbromoarborescidines A-C and the formal synthesis of (S)-deplancheine have been accomplished via a common intermediate (S)-indolo[2,3-a]quinolizine. Synthesis of enantiomerically pure (S)-acetoxyglutarimide, stereoselective reductive intramolecular cyclization, hydroxyl group-assisted in situ N-Boc-deprotection, selective deoxygenation of the xanthate ester, and lactam hydrolysis followed by an appropriate exchange of nitrogen regioselectivity in intramolecular cyclization were the decisive steps.
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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem