Facile Synthesis of 2-Acylthieno[2,3-<i>b</i>]quinolines via Cu-TEMPO-Catalyzed Dehydrogenation, sp<sup>2</sup>-C–H Functionalization (Nucleophilic Thiolation by S<sub>8</sub>) of 2-Haloquinolinyl Ketones
作者:Chitrala Teja、Fazlur Rahman Nawaz Khan
DOI:10.1021/acs.orglett.9b04598
日期:2020.3.6
An efficient, solvent-free synthesis of 2-acylthieno[2,3-b]quinolines is reported from 2-halo-quinolinyl ketones through Cu-TEMPO catalyzed dehydrogenation, sp2-C-H functionalization using elemental sulfur as thiol surrogate (sulfur source) and tetrabutylammonium acetate as an ionic reaction medium. The optimized reaction conditions give excellent product yields under mild reaction conditions with
Ir(I)‐Catalyzed Synthesis of (
<i>E</i>
)‐4‐Benzylidenylacridines and (
<i>E</i>
)‐2‐Styrylquinoline‐3‐carboxamide through Sequential Suzuki–Miyaura Coupling, Dehydrogenative Friedländer Reaction, and sp
<sup>3</sup>
‐C–H Activation
作者:Soda Prameela、Fazlur‐Rahman Nawaz Khan
DOI:10.1002/ejoc.202000834
日期:2020.9.7
DESs mediated three (or) four‐component one‐pot assembly of (E)‐4‐benzylidenylacridin‐1(2H)‐ones (E)‐2‐styryl quinoline‐3‐carboxamides is described. The method involves the consecutive three carbon–carbon and one carbon–nitrogen bond formation in a single reaction vessel. Moreover, gram scale synthesis and detailed mechanistic study have been established.
range of 21.71–375.00 µM. Amongst the substituted functionalized quinolinederivatives, compounds 10b, 10d, 11c-11d, 17b-17c, and 18c-18d displayed very promising results. The single crystal X-ray diffraction of compound 12 unambiguously confirmed its structure. This study has unravelled a new series of substituted quinolinederivatives as good inhibitors of α-glucosidase enzyme. All the active hits