作者:Gerd-Volker Röschenthaler、Valentine Nenajdenko、Nikolay Shevchenko、Elisabeth Balenkova
DOI:10.1055/s-0029-1217104
日期:2010.1
A convenient and simple approach for the preparation of α-CF3 and α-C2F5 substituted pyrrolines, tetrahydropyridines, tetrahydroazepine is described. Claisen condensation of N-protected cyclic amides with esters of perfluorocarboxylic acids followed by deprotection and decarboxylation in acidic media leads to the desired products. Reduction of these imines permits to obtain 5-, 6-, and 7-membered cyclic
对于α-CF的制备方便和简单的方法3和α-C 2 ˚F 5取代的吡咯啉,四氢吡啶,tetrahydroazepine进行说明。N-保护的环酰胺与全氟羧酸的酯的克莱森缩合,然后在酸性介质中脱保护和脱羧,得到所需的产物。这些亚胺的还原允许获得5-,6-和7-元环胺用α-CF 3或α-C 2 ˚F 5基团以良好至中度的总产率。 氟-氮杂环-α-多氟烷基亚胺-还原