Synthesis of 3-Sulfonylamino Quinolines from 1-(2-Aminophenyl) Propargyl Alcohols through a Ag(I)-Catalyzed Hydroamination, (2 + 3) Cycloaddition, and an Unusual Strain-Driven Ring Expansion
作者:Yalla Kiran Kumar、Gadi Ranjith Kumar、Thota Jagadeshwar Reddy、Balasubramanian Sridhar、Maddi Sridhar Reddy
DOI:10.1021/acs.orglett.5b00832
日期:2015.5.1
We describe herein a silver-catalyzed conversion of 1-(2-aminophenyl)-propargyl alcohols to 4-substituted 3-tosylaminoquinolines using TsN3 as an amino surrogate. Controlled reactions reveal the pathway consisting of Ag(I)-catalyzed 5-exo-dig cyclization, catalyst-free (2 + 3) cycloaddition, and ring-expansive rearrangement via nitrogen expulsion. As a support study, we show that the cyclic enamines
我们在本文中描述了使用TsN 3作为氨基替代物将银催化的1-(2-氨基苯基)-炔丙基醇向4-取代的3-甲苯磺酰基氨基喹啉的银催化转化。受控的反应揭示了由Ag(I)催化的5- exo - dig环化,无催化剂的(2 + 3)环加成和通过氮驱出的环膨胀重排组成的途径。作为一项支持研究,我们证明了在类似条件下的环状烯胺会通过C-C键迁移而产生am。