Metal-Free Annulation Cascades of 1,7-Enynes Using Di-<i>tert</i>
-butyl Peroxide as the Methyl Source towards the Synthesis of Polyheterocyclic Scaffolds
作者:Fang-Lin Tan、Ming Hu、Ren-Jie Song、Jin-Heng Li
DOI:10.1002/adsc.201700699
日期:2017.10.25
construct methylated polyheterocyclic scaffold skeletons is described. In this transformation, three new C–C bonds and two new rings are formed. Notably, di-tert-butyl peroxide (DTBP) acts not only as a radical initiator but also as an efficient methyl source.
nickel-catalyzed cyclization of N-(o-ethynylaryl)acrylamides for the selective synthesis of dihydrocyclobuta[c]quinolin-3-ones and benzo[b]azocin-2-ones. The two varied products could be easily obtained by tuning the reaction temperature. This reaction features easy temperature-control, high efficiency, and gram-scale synthesis.
我们在本文中描述了镍催化的N -( o -ethynylaryl) 丙烯酰胺环化反应,用于选择性合成二氢环丁[ c ]quinolin-3-ones 和 benzo [ b ]azocin-ones。通过调节反应温度可以很容易地获得两种不同的产物。该反应具有易控温、高效、克级合成等特点。
Palladium-Catalyzed Construction of Tetracyclic Scaffolds via the 1,7-Enyne Carbocyclization/Iodophenol Dearomatization Cascade
An efficient palladium-catalyzed dearomatizing [2+2+1] carbocyclization of 1,7-enynes with iodophenols has been developed. A type of tetracyclicscaffold was built in this reaction, exhibiting a broad substrate scope with moderate to excellent yields. More importantly, this method provides a potential strategy for the synthesis of tetracyclic skeleton natural products.
Cobalt‐Catalyzed Enantioselective Hydroboration/Cyclization of 1,7‐Enynes: Asymmetric Synthesis of Chiral Quinolinones Containing Quaternary Stereogenic Centers
作者:Caizhi Wu、Jiayu Liao、Shaozhong Ge
DOI:10.1002/anie.201903377
日期:2019.6.24
An asymmetric cobalt‐catalyzed hydroboration/cyclization of 1,7‐enynes to synthesize chiral six‐membered N‐heterocyclic compounds was developed. A variety of aniline‐tethered 1,7‐enynes react with pinacolborane to afford the corresponding chiral boryl‐functionalized quinoline derivatives in high yields with high enantioselectivity. This cobalt‐catalyzed asymmetric cyclization of 1,7‐enyens provides
Copper-promoted [2+2+2] annulation of 1,n-enynes through decomposition of azobis(alkyl nitrile)s
作者:Bang Liu、Cheng-Yong Wang、Ming Hu、Ren-Jie Song、Fan Chen、Jin-Heng Li
DOI:10.1039/c6cc09063j
日期:——
A novel copper-promoted [2+2+2] annulation of 1,n-enynes with azobis(alkyl nitrile)s and H2O for the synthesis of diverse 7,8-dihydrophenanthridine-6,9(5H,6aH)-diones and fluorene is described. The reaction preceeds via the decomposition of azobis(alkyl...