131953-10-1Relevant articles and documents
Method For Preparing Hexahydrofuro-Furanol Derivative, Intermediate Thereof And Preparation Method Thereof
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Paragraph 0049; 0050, (2021/01/25)
The invention relates to the field of pharmaceutical synthesis, in particular to a preparation method of (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-ol derivatives and their intermediates. The preparation method is carried out starting from compound Formula A1. In the preparation of (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-ol derivatives, the chirality was constructed by enzymatic method, and the products were prepared with high optical purity. The preparation method can be used to produce the key intermediates of (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-ol of darunavir commercially, which is a very economical route suitable for industrial production.
Cephalosporin derivatives
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, (2008/06/13)
β-Lactam compounds of the formula (Ia) including pharmaceutically acceptable salts and in vivo hydrolysable esters, processes for their preparation and their use as antibiotics: STR1 wherein R1 is hydrogen, methoxy or formamido; R2 i