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.
Metal-Free Radical [2+2+1] Carbocyclization of Benzene-Linked 1,<i>n</i>-Enynes: Dual C(sp<sup>3</sup>)H Functionalization Adjacent to a Heteroatom
作者:Ming Hu、Jian-Hong Fan、Yu Liu、Xuan-Hui Ouyang、Ren-Jie Song、Jin-Heng Li
DOI:10.1002/anie.201504603
日期:2015.8.10
A new metal‐free oxidative radical [2+2+1] carbocyclization of benzene‐linked 1,n‐enynes with two C(sp3)H bonds adjacent to the same heteroatom is described. This method achieves two C(sp3)H oxidative functionalizations and an annulation, thus providing efficient and general access to a variety of fused five‐membered carbocyclic hydrocarbons.
Palladium-catalyzed oxidative 6-exo-trig cyclization of 1,6-enynes: facile synthesis of bicyclo[4.1.0]heptan-5-ones
作者:Bang Liu、Ren-Jie Song、Xuan-Hui Ouyang、Yang Li、Ming Hu、Jin-Heng Li
DOI:10.1039/c5cc04300j
日期:——
We here describe a new palladium-catalyzed oxidative 6-exo-trig cyclization of 1,6-enynes at room temperature using tBuONO as oxidant for the synthesis of 3-bicyclo[4.1.0]heptan-5-ones. This cascade strategy achieves hydration, cyclization and...
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...
Oxidative Divergent Bicyclizations of 1,n-Enynes through α-C(<i>sp</i><sup>3</sup>)-H Functionalization of Alkyl Nitriles
作者:Ming Hu、Meng Li、Fang-Lin Tan、Ren-Jie Song、Ye-Xiang Xie、Jin-Heng Li
DOI:10.1002/adsc.201600926
日期:2017.1.4
A new, radical‐mediated, divergentbicyclization of 1,n‐enynes by α‐C(sp3)–Hoxidativefunctionalization of alkylnitriles is described using the Sc(OTf)3 and Ag2O system. The reaction allows the selective functionalization of one or two C(sp3)−H bonds α to the nitrile group by both oxidants and the substitution effect co‐controlled the divergentbicyclization reactions, and offers a step‐ and atom‐economical
Intermolecular oxidative decarbonylative [2 + 2 + 2] carbocyclization of N-(2-ethynylaryl)acrylamides with tertiary and secondary alkyl aldehydes involving C(sp<sup>3</sup>)–H functionalization
作者:Yang Li、Gao-Hui Pan、Ming Hu、Bang Liu、Ren-Jie Song、Jin-Heng Li
DOI:10.1039/c6sc02451c
日期:——
s with tertiary and secondaryalkyl aldehydes is described. This reaction enables the formation of three new C–C bonds in a single reaction by a sequence of oxidative decarbonylation, radical addition across C–C unsaturated bonds, C–H functionalization and annulation, and represents the first oxidative decarbonylative [2 + 2 + 2] carbocyclization approach using tertiary and secondaryalkyl aldehydes