81.
    发明专利
    未知

    公开(公告)号:BR0113236A

    公开(公告)日:2005-12-13

    申请号:BR0113236

    申请日:2001-07-20

    Abstract: The present invention relates to a process for the stereoselective enzymatic reduction of 1-halo-2-oxo-3-(protected)amino-4-substituted-butanes utilizing certain species of Rhodococcus and Brevibacterium. The product 1-halo-2-hydroxy-3-(protected)amino-4-substituted-butanes, which are useful as intermediates in the synthesis of compounds that are inhibitors of ACE, renin and HIV proteases, are obtained in high yield and, particularly, in very high diastereomeric purity. The process is advantageously highly selective for the (3S,2R) enantiomer of the product.

    87.
    发明专利
    未知

    公开(公告)号:AT260267T

    公开(公告)日:2004-03-15

    申请号:AT99937759

    申请日:1999-08-03

    Abstract: A process useful for the preparation of intermediates in synthesis or semi-synthesis of paclitaxel analogs wherein a starting taxane such as 10-deacetylbaccatin III is deacetylated at the C-4 position using a microorganism or an enzyme derived therefrom to provide 4-deacetyltaxanes, such as 4,10-dideacetylbaccatin III.

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