| 摘要 |
<p>The present invention provides a process for the preparation of a compound of the formula (X) useful as precursor for the A-ring in taxanes wherein R', is an acyl R'' (a), in which R'' is linear, branched or cyclic alkyl group of 1 to 10 carbon atoms. The invention further relates to the novel compound (X) and to novel intermediates in said process.</p> |
