摘要:
The present invention relates to a process for the preparation of 4-(R)-hydroxycyclopent-2-en-1 (S)-acetate of the formula 2 by reacting meso-cyclopent-2-en-1, 4-diacetate of formula 1 with a whole cell enzyme in a mixture of a buffer and an organic solvent, filtering the reaction mixture to remove the enzyme, extracting the resultant compound with an organic solvent, and removing the solvent to obtain the desired product.
摘要:
The present invention relates to a process for the preparation of optically active 6-hydroxymethyl-4-tert-butyldimethylsilyloxy)-(4S,6R)-tetrahydro-2H-2-pyranone (&bgr; Hydroxy &dgr; Lacone) and the compound 3-oxo-5-(tert.butyldimethylsilyloxy-(1S-5S)-cyclohexylacetate having the formula the compound 3-hydroxy-5-(tert,butyldimethylsilyloxy)-(3R,5S)-cyclohexan-1 having the formula
摘要:
The present invention relates to a process for the preparation of optically active 6-hydroxymethyl-4-(tert-butyldimethylsilyloxy)-(4R,6S)-tetrahydro-2H-2-pyranone(&bgr;-Hydroxy-&dgr;-lactone) an important intermediate in the synthesis of biologically active drugs e.g. compactin, atorvastatin, fluvastatin, cholesterol lowering drugs.
摘要:
Compounds of formula (I) and their pharmaceutically acceptable salts are described. Processes for their preparation, pharmaceutical compositions containing them, their use as medicaments and their use in the treatment of bacterial infections are also described.