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.
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...
Sulfur Incorporation Using Disulfanes as the Sulfur Atom Source Enabled Metal‐Free Heteroannulation of 1,7‐Enynes
作者:Jing‐Hao Qin、Jiang‐Xi Yu、Jin‐Heng Li、De‐Lie An
DOI:10.1002/adsc.201900621
日期:2019.9.3
A new oxidative [2+2+1] heteroannulation of 1,7‐enynes with disulfanes promoted by Et3N, producing 3,3a‐dihydro‐thieno[3,4‐c]quinolin‐4(5H)‐ones, is described. This reaction is achieved by using equivalent amounts of 1,7‐enynes, sulfur atoms (disulfanes), tert‐butyl peroxybenzoate (TBPB) as an oxidant and Et3N as the base, and represents an unprecedented strategy to applications of disulfanes as sulfur
Metal-free oxidative [2+2+1] heteroannulation of 1,7-enynes with thiocyanates toward thieno[3,4-<i>c</i>]quinolin-4(5<i>H</i>)-ones
作者:Jiang-Xi Yu、Shijie Niu、Ming Hu、Jian-Nan Xiang、Jin-Heng Li
DOI:10.1039/c9cc02242b
日期:——
metal-free oxidative [2+2+1] heteroannulation of 1,7-enynes with thiocyanates for producing thieno[3,4-c]quinolin-4(5H)-ones is presented. This reaction employs benzoylperoxide (BPO) as the oxidant and sodium thiocyanate as the sulfur source to enable the formation of three chemical bonds, two C–S bonds and one C–C bond, in a single reaction, and represents a new, practical access to S-heterocycles with
提出了一种新的无金属的1,7-烯炔与硫氰酸盐的氧化性[2 + 2 + 1]杂环化反应,用于生产噻吩并[3,4- c ]喹啉-4(5 H)-酮。该反应采用过氧化苯甲酰(BPO)作为氧化剂,硫氰酸钠作为硫源,可在一次反应中形成三个化学键,两个CS键和一个CC键,代表了一种新的实用途径避免使用金属催化剂和过量的碱。
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
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