We describe an enantioselective synthesis of (3,3,6)-hexahydrofuro[2,3-]furan-3-ol which is a key subunit of darunavir, a widely used HIV-1 protease inhibitor drug for the treatment of HIV/AIDS patients. The synthesis was achieved in optically pure form utilizing commercially available sugar derivatives as the starting material. The key steps involve a highly stereoselective substrate-controlled hydrogenation, a Lewis acid catalyzed anomeric reduction of a 1,2--isopropylidene-protected glycofuranoside, and a Baeyer-Villiger oxidation of a tetrahydrofuranyl-2-aldehyde derivative. This optically active ligand alcohol was converted to darunavir efficiently.
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http://dx.doi.org/10.1021/acs.joc.0c02396 | DOI Listing |
J Org Chem
January 2021
Department of Chemistry and Department of Medicinal Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States.
We describe an enantioselective synthesis of (3,3,6)-hexahydrofuro[2,3-]furan-3-ol which is a key subunit of darunavir, a widely used HIV-1 protease inhibitor drug for the treatment of HIV/AIDS patients. The synthesis was achieved in optically pure form utilizing commercially available sugar derivatives as the starting material. The key steps involve a highly stereoselective substrate-controlled hydrogenation, a Lewis acid catalyzed anomeric reduction of a 1,2--isopropylidene-protected glycofuranoside, and a Baeyer-Villiger oxidation of a tetrahydrofuranyl-2-aldehyde derivative.
View Article and Find Full Text PDFOrg Process Res Dev
January 2017
Clinton Health Access Initiative, 800 North Five Points Road, West Chester, Pennsylvania 19380, United States.
A practical synthesis of (3,3a,6a)-hexahydrofuro[2,3-]furan-3-ol-a key intermediate in the synthesis of darunavir-from monopotassium isocitrate is described. The isocitric acid salt, obtained from a high-yielding fermentation fed by sunflower oil, was converted in several steps to a tertiary amide. This amide, along with the compound's ester functionalities, was reduced with lithium aluminum hydride to give, on acidic workup, a transient aminal-triol.
View Article and Find Full Text PDFJ Org Chem
January 2017
Institute of Organic Chemistry, Johannes Gutenberg University, Duesbergweg 10-14, 55128 Mainz, Germany.
A concise and efficient synthesis of (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-ol, a key building block for several clinical and experimental HIV protease inhibitors including the highly important drug darunavir, was achieved via a one-pot procedure using furan and Cbz-protected glycol aldehyde as starting materials. A [2+2]-photocycloaddition between both reactants which can be prepared from wood-based starting materials according to the principles of xylochemistry, followed by hydrogenation and lipase-catalyzed kinetic resolution afforded the target compound in high yield and up to 99% ee.
View Article and Find Full Text PDFSynthesis (Stuttg)
September 2006
Departments of Chemistry and Medicinal Chemistry, Purdue University, West Lafayette, IN 47907, USA.
A stereoselective synthesis of (3,3a,6a)-hexahydrofuro[2,3-]furan-3-ol, an important high affinity P-ligand, in high enantiomeric excess (>99%) is reported. The synthesis features an ester-derived titanium enolate based highly stereoselective -aldol reaction as the key step.
View Article and Find Full Text PDFOrg Lett
December 2005
DSM Pharma Chemicals, LS-ASC&D, PO Box 18, 6160 MD Geleen, The Netherlands.
[reaction: see text] Two short and efficient synthesis routes have been developed for bis-THF-alcohol 2, a key building block of the investigational HIV protease inhibitor TMC114 (1). Using S-2,3-O-isopropylideneglyceraldehyde (4) as the source of chirality, both routes are based on a diastereoselective Michael addition of nitromethane to give predominantly the syn congeners 6 followed by a Nef oxidation and cyclization to afford lactone acetals 8, which are reduced and cyclized to give 2.
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