Copper-Catalyzed N,N-Diarylation of Amides for the Construction of 9,10-Dihydroacridine Structure and Applications in the Synthesis of Diverse Nitrogen-Embedded Polyacenes
作者:Mei-Ling Tan、Shuo Tong、Sheng-Kai Hou、Jingsong You、Mei-Xiang Wang
DOI:10.1021/acs.orglett.0c01775
日期:2020.7.17
catalyzed N,N-diarylation reaction of amides with various di(o-bromoaryl)methanes to produce diverse 9,10-dihydroacridine derivatives. The resulting 9,10-dihydroacridine derivatives were oxidized selectively under mild conditions to afford acridine, acridinone, and acridinium derivatives. The copper-catalyzed N,N-diarylation reaction coupled with oxidative aromatization reaction enabled the facile construction
Syntheses, Structures, and Reductive Elimination Studies of Six-Membered Diaryl Platinacycle Complexes
作者:Robert Robinson、Paul R. Sharp
DOI:10.1021/om901033z
日期:2010.3.22
(dppp), 4,4′-bis-tert-butyl-2,2′-bipyridine (tBu2bpy)), have been prepared from cis-PtL2Cl2 and the appropriate dilithio reagents. Reductiveelimination studies on the platinacycles with L = PEt3 show that the bridging group (X) dramatically influences the reductiveelimination rate. Thermodynamic activation parameters were determined for the platinacycles and showed a ΔH⧧ trend X = NMe ≪ O < CH2 with an
六元铂盐环化合物PtL 2(C 6 H 4 XC 6 H 4)(X = CH 2,O,NMe; L = PEt 3,L 2 = 1,3-双(二苯基膦基)丙烷(dppp),4,由顺式-PtL 2 Cl 2和适当的二硫代试剂制备了4'-双-叔丁基-2,2'-联吡啶(t Bu 2 bpy)。L = PEt 3的platinacycles的还原消除研究表明桥接基团(X)极大地影响了还原消除率。热力学激活参数被确定为platinacycles并呈现出Δ ħ ⧧趋势X = NME«0
Structurally Diverse π‐Extended Conjugated Polycarbo‐ and Heterocycles through Pd‐Catalyzed Autotandem Cascades
The Pd‐catalyzed reaction between 2,2′‐dibromobiphenyls and related systems with tosylhydrazones gives rise to new π‐extendedconjugatedpolycarbo‐ and heterocyclesthrough an autotandem process involving a cross‐coupling reaction followed by an intramolecular Heck cyclization. The reaction shows wide scope regarding both coupling partners. Cyclic and acyclic tosylhydrazones can participate in the
Synthesis and application of precursors of hetero-anthracenes
作者:F. Bickelhaupt、C. Jongsma、P. de Koe、R. Lourens、N.R. Mast、G.L. van Mourik、H. Vermeer、R.J.M. Weustink
DOI:10.1016/0040-4020(76)85198-8
日期:1976.1
In the diphenylmethane series, the synthesis of 2,2′ - diiododiphenylmethane (4g) and the improved synthesis of 2,2′ - dibromodiphenylmethane (4e) are reported. The triphenylmethane derivatives, 2-bromo-, 2-iodo-, 2,2′-dichloro-, 2,2′-dibromo- and 2,2′-diiodotriphenylmethane (4f, 4h, 4i, 4j and 4k, respectively) have been prepared. Via an entirely different approach, 1-(2-bromophenyl)- and 1 - (2 -