Synthesis of indoles from aroyloxycarbamates with alkynes <i>via</i> decarboxylation/cyclization
作者:Nuannuan Ma、Peihe Li、Zheng Wang、Qipu Dai、Changwen Hu
DOI:10.1039/c8ob00086g
日期:——
decarboxylation/cyclization of aroyloxycarbamates to realize substituted indoles has been disclosed. Terminal alkynes as the coupling partners lead to site specific 2-substitutedindoles through two pathways, while internal alkynes with aroyloxycarbamates can be transformed to 2,3-disubstituted indoles directly. This protocol is further demonstrated by the efficient synthesis of indoles as well as the
A mild, efficient and LiCl-free synthetic method for indole derivatives based on the heteroannulation of alkynes with 2-iodoanilines was achieved using palladium on carbon (Pd/C) and NaOAc in heated NMP. The N-tosyl protection of 2-iodoaniline expedited the reaction progress, while other protecting groups, such as tert-butoxycarbonyl, acetyl, and benzyloxycarbonyl groups, underwent deprotection under
Oxidative Annulation of Anilides with Internal Alkynes Using an (Electron‐Deficient η
<sup>5</sup>
‐Cyclopentadienyl)Rhodium(III) Catalyst Under Ambient Conditions
作者:Yuki Hoshino、Yu Shibata、Ken Tanaka
DOI:10.1002/adsc.201300884
日期:2014.5.5
A dinuclear (electron‐deficient η5‐cyclopentadienyl)rhodium(III) complex was synthesized on a preparative scale via the rhodium‐catalyzed cross [2+2+1] cyclotrimerization of silylacetylenes and twoalkynylesters, leading to substitutedsilylfulvenes, followed by reductive complexation with rhodium(III) chloride in ethanol. The thus obtained dinuclear (electron‐deficient η5‐cyclopentadienyl)rhodium(III)