253265-97-3Relevant articles and documents
The Chiron Approach to (3 R,3 aS,6 aR)-Hexahydrofuro[2,3- b]furan-3-ol, a Key Subunit of HIV-1 Protease Inhibitor Drug, Darunavir
Ghosh, Arun K.,Markad, Shivaji B.,Robinson, William L.
, p. 1216 - 1222 (2020/12/22)
We describe an enantioselective synthesis of (3R,3aS,6aR)-hexahydrofuro[2,3-b]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-O-isopropylidene-protected glycofuranoside, and a Baeyer-Villiger oxidation of a tetrahydrofuranyl-2-aldehyde derivative. This optically active ligand alcohol was converted to darunavir efficiently.
Practical synthesis of the bicyclic darunavir side chain: (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-ol from monopotassium isocitrate
Moore, Gary L.,Stringham, Rodger W.,Teager, David S.,Yue, Tai-Yuen
, p. 98 - 106 (2017/11/30)
A practical synthesis of (3R,3aS,6aR)-hexahydrofuro[2,3-b]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. This was converted in situ to the title compound, the bicyclic acetal furofuranol side chain of darunavir, a protease inhibitor used in treatment of HIV/AIDS. Key to the success of this process was identifying an optimal amide that allowed for complete reaction and successful product isolation. N-Methyl aniline amide was identified as the most suitable substrate for the reduction and the subsequent cyclization to the desired product. Thus, the side chain is produced in 55% overall yield from monopotassium isocitrate.
METHOD FOR PRODUCING HEXAHYDROFUROFURANOL DERIVATIVE
-
Paragraph 0016; 0017; 0023; 0024, (2018/09/11)
PROBLEM TO BE SOLVED: To provide a method for producing a hexahydrofurofuranol derivative represented by the formula (I-1). SOLUTION: There is provided a method for producing a hexahydrofurofuranol derivative which comprises: a step A of mixing a compound represented by the formula (II-1), di(N-succinimidyl) carbonate and a base in the presence of one or more solvents selected from ethers and acetic esters to obtain an objective compound; a step B of mixing the solution in the step A with 2-propanol to precipitate the objective compound; and a step B of filtering the objective compound precipitated in the step B to separate the objective compound. SELECTED DRAWING: None COPYRIGHT: (C)2016,JPOandINPIT