| 摘要 |
<p>A process for the preparation of a compound of structure (I), in which n is 1 to 3 and each group R is hydrogen or alkyl, which comprises, reaction of a compound of structure (II), in which R1 is alkyl, phenyl or substituted phenyl and n is 1 to 3, with an amine HNR¿2? in which R is as described for structure (I), and optionally thereafter forming a salt.</p> |
