作者:Ursula Mävers、France Berruex、Manfred Schlosser
DOI:10.1016/0040-4020(95)01106-4
日期:1996.2
N-(Fluoro-3-methoxyacryloyl)anilines [2-fluoro-3-methoxyprop-2-enanilides] can be prepared by condensation between lithium anilides and methyl 2-fluoro-3-methoxyprop-2-enoate. Under strongly acidic conditions, these intermediate undergo a cyclization reaction accompanied by elimination of methanol to afford 3-fluoro-2-quinolones. Substituents occupying the para or ortho position of the aniline appear at the heterocyclic
N-(氟-3-甲氧基丙烯酰基)苯胺[2-氟-3-甲氧基丙-2-烯胺化物]可以通过在苯甲酸锂和2-氟-3-甲氧基丙-2-烯酸甲酯之间缩合制备。在强酸性条件下,这些中间体进行环化反应,同时消除甲醇,得到3-氟-2-喹诺酮。占据苯胺对位或邻位的取代基分别出现在杂环的6位和8位。通常,连接到苯胺间位的取代基形成区域异构体的1:1混合物。只中号-anisidine [3-甲氧基-4-苯胺]和米-氟苯胺是一个例外:它们主要产生7-且仅微量的5-取代的喹诺酮。