| 摘要 |
<p>A process for the preparation of compounds of general formula (I), (wherein R and R1 stand for an aliphatic acyloxy group comprising 2-5 carbon atoms and optionally substituted by halogen or for an aromatic acyloxy group comprising 7-11 carbon atoms), which comprises reacting a compound of general formula (II), (wherein R2 stands for hydrogen or alkyl comprising 1-4 carbon atoms) with a borone derivative of general formula (III), (wherein R?3, R4 and R5¿ stand for an alkyl group comprising 1-4 carbon atoms and optionally substituted by halogen or for an aryl group comprising 6-10 carbon atoms). The new compounds of general formula (I) are useful pharmaceutical intermediates.</p> |
