作者:Anton V. Chernykh、Dmytro S. Radchenko、Alla V. Chernykh、Ivan S. Kondratov、Nataliya A. Tolmachova、Olexandr P. Datsenko、Maxim A. Kurkunov、Sergey X. Zozulya、Yuri P. Kheylik、Katharina Bartels、Constantin G. Daniliuc、Günter Haufe
DOI:10.1002/ejoc.201500746
日期:2015.9
Hitherto unknown cis- and trans-3-alkyl- and 3-aryl-3-fluorocycobutylamines have been synthesised selectively from 3-oxocyclobutane carboxylic acid in six or seven steps. Comparison of their pKa and log D values with those of the fluorine-free parent compounds showed acidification by about 0.8 units, irrespective of the stereochemistry. This indicates that there are no through-space interactions between
迄今为止未知的顺-和反-3-烷基-和3-芳基-3-氟环丁胺已经在六到七步中从3-氧代环丁烷羧酸选择性地合成。无论立体化学如何,将它们的 pKa 和 log D 值与无氟母体化合物的 pKa 和 log D 值进行比较显示酸化约 0.8 个单位。这表明氟和氨基官能团之间没有空间相互作用——这一结论得到了 X 射线分析结果的支持。与非氟化类似物相比,发现氟化反式化合物更具亲脂性 (Δ log P ≈ 1),而顺式异构体的差异很小。