Copper-Catalyzed Radical [2 + 2 + 1] Annulation of Benzene-Linked 1,n-Enynes with Azide: Fused Pyrroline Compounds
摘要:
A novel selective copper-catalyzed radical [2 + 2 + 1] annulation of benzene-linked 1,n-enynes with azido-benziodoxolone to access fused pyrroline compounds, including 3H-pyrrolo[3,4-c]quinolin-4(3aH)-ones, chromeno[3,4-c]pyrrol-4(9bH)-one, and indeno[1,2-c]pyrroline, has been developed, which proceeds via the addition of the azide radical to the alkene, annualtion, and azidation cascade.
Cascade Nitration/Cyclization of 1,7-Enynes with<i>t</i>BuONO and H<sub>2</sub>O: One-Pot Self-Assembly of Pyrrolo[4,3,2-<i>de</i>]quinolinones
作者:Yu Liu、Jia-Ling Zhang、Ren-Jie Song、Peng-Cheng Qian、Jin-Heng Li
DOI:10.1002/anie.201404192
日期:2014.8.18
Here we describe the one‐pot construction of the pyrrolo[4,3,2‐de]quinolinone scaffold by a cascadenitration/cyclization sequence of 1,7‐enynes with tBuONO and H2O. The cascade proceeds through alkene nitration, 1,7‐enyne 6‐exo‐trig cyclization, CH nitrations, and redox cyclization, and exhibits excellent functional group tolerance. The mechanism was investigated using in situ high‐resolution mass
Visible-Light-Promoted Tandem Annulation of <i>N</i>-(<i>o</i>-Ethynylaryl)acrylamides with CH<sub>2</sub>Cl<sub>2</sub>
作者:Yu Liu、Ren-Jie Song、Shenglian Luo、Jin-Heng Li
DOI:10.1021/acs.orglett.7b03561
日期:2018.1.5
A novel tandem annulation of N-(o-ethynylaryl)acrylamides, with CH2Cl2 as a one-carbon unit, for the divergent synthesis of cyclopenta[c]quinolin-4(5H)-ones and benzo[j]phenanthridin-6(5H)-ones, which relies on the substitution effect of the 2 position of the acrylamide moiety, is described. Promoted by the visible-light photoredox catalysis, this reaction allows the formation of multiple chemical
Visible Light-Initiated C(<i>sp</i><sup>3</sup>)Br/C(<i>sp</i><sup>3</sup>)H Functionalization of α-Carbonyl Alkyl Bromides through Hydride Radical Shift
作者:Yang Li、Bang Liu、Ren-Jie Song、Qiu-An Wang、Jin-Heng Li
DOI:10.1002/adsc.201501134
日期:2016.4.14
A new visible light‐initiated 1,5‐hydride radical shift strategy has been developed to enable the one‐step functionalization of both a C(sp3)Br bond and a C(sp3)H bond adjacent to the same carbon atom. This visible light photoredox catalysis offers a mild and straightforward access to diverse five‐membered carbocyclic ring‐fused polycyclic hydrocarbons with high turnover numbers (TONs; up to 4.93×103)