Transition-Metal-Free Carbofluorination of TBS-Protected Nitrogen-Containing Cyclic Enynols: Synthesis of Fluorinated Azabicycles
作者:Ming-Chang P. Yeh、Chia-Jung Liang、Tzu-Lin Huang、Hsiao-Ju Hsu、Yu-Shuo Tsau
DOI:10.1021/jo400634c
日期:2013.6.7
The synthesis of fluorinated azabicycles from tert-butyldimethylsilyl-protected N-containing cyclic enynols using inexpensive BF3·OEt2 is described. In this reaction, BF3 reacts as both the Lewis acid and the fluoride source for cyclization/fluorination of the TBS-protected cyclic N-containing enynols. The method provides an easy access to fluorinated azabicycles where a new C(sp2)–F bond and a new
描述了使用廉价的BF 3 ·OEt 2由叔丁基二甲基甲硅烷基保护的含N的环状烯醇合成氟化的氮杂双环。在该反应中,BF 3作为路易斯酸和氟化物源两者进行反应,以用于TBS保护的环状含N的烯醇的环化/氟化。该方法可轻松访问含氟氮杂双环,在无金属反应条件下,于室温下1-13分钟内可生成新的C(sp 2)-F键和新的双环骨架。