| 摘要 |
<p>A process for preparing a compound having formula (I) by (A) reacting a compound having formula (II), wherein R5 is aryl or heteroaryl, with a dehydrating agent to produce an imine having formula (IIa); and (B) hydrolyzing the imine produced in step (A) to produce the compound having formula (I). The imines and a process for preparing a compound having formula (III) are disclosed.</p> |
