| 摘要 |
<p>Process for the preparation of 4-aminobut-2-enolide compounds of the formula (I): comprising reaction of a 4-(methylamino)furan-2(5H)-one compound of the formula (II) with an amine of the formula (III) in which R1 and A have the definitions mentioned in the description, optionally in the presence of a Bronstedt acid.</p> |
