moisture-stable dibenzo[b,f]gallepins with planarseven-memberedrings have been designed and synthesized. From X-ray single-crystal analyses, the effects of the coordination numbers were evaluated at the gallium atom on the planarity of the seven-memberedrings with a series of the synthesized complexes. Accordingly, it was shown that the seven-memberedring of dibenzogallepin involving a three-coordinated
Palladium-Catalyzed Oxidative Borylation of Allylic C–H Bonds in Alkenes
作者:Lujia Mao、Rüdiger Bertermann、Simon G. Rachor、Kálmán J. Szabó、Todd B. Marder
DOI:10.1021/acs.orglett.7b03296
日期:2017.12.15
palladium pincer complex-catalyzed allylic C–H borylation of alkenes. The transformation exhibits high regio- and stereoselectivity with a variety of linear alkenes. A synthetically useful feature of this allylic C–H borylation method is that all allyl-Bpin products can be isolated in usually high yields. Preliminary mechanistic studies indicate that this C–H borylation reaction proceeds via Pd(IV) pincer
Aerobic oxidation-functionalization of the aryl moiety in van Koten's pincer complex (NCN)Ni(<scp>ii</scp>)Br: relevance to carbon–heteroatom coupling reactions promoted by high-valent nickel species
mechanistic underpinnings of C–C and C-heteroatom bond forming steps. One approach to such mechanistic studies involves probing the reactivities of model complexes featuring chelate-stabilized M-hydrocarbyl moieties. The present study uses van Koten's (NCN)Ni(II)Br compound as a model for probing C-heteroatom coupling with protic substrates HX (X = NHR, OR). Our results establish the crucial importance of
Heterofluorenes containinggroup13 atoms such as aluminum (alumafluorene) and gallium (gallafluorene) were synthesized and characterized. The synthesized heterofluorenes had five-coordinated state...
Structural characterization of the derivatives of bis{[2,6-(dimethylamino)methyl]phenyl} selenide with palladium(II) and mercury(II)
作者:Anand Gupta、Rajesh Deka、Ray J. Butcher、Harkesh B. Singh
DOI:10.1107/s2053229620010311
日期:2020.8.1
diorgano selenide bis2,6‐bis[(dimethylamino)methyl]phenyl} selenide, C24H38N4Se or R2Se, where R is 2,6‐(Me2NCH2)2C6H3, 14, was synthesized and its ligation reactions with PdII and HgII precursors were explored. The reaction of 14 with SO2Cl2 and K2PdCl4 resulted in the formation of the meta C—H‐activated dipalladated complex μ‐2,2′‐bis[(dimethylamino)methyl]‐4,4′‐bis[(dimethylazaniumyl)methyl]‐3,3′‐sel
分子内配位的均化双有机硒双2,6-双[((二甲基氨基)甲基]苯基}硒,C 24 H 38 N 4 Se或R 2 Se,其中R为2,6-(Me 2 NCH 2)2 C 6 ħ 3,14,合成和其用Pd连接反应II和Hg II前体进行了探索。的反应14与SO 2氯2和K 2的PdCl 4导致的形成元C-H活化dipalladated复杂μ-2,2'-双[(二甲基氨基)甲基] -4,4'-双[(dimethylazaniumyl)甲基] -3,3'- selanediyldiphenyl-κ 4 Ç 1,Ñ 2:C 1',N 2' }双[二氯钯(II)],[Pd 2 Cl 4(C 24 H 38 N 4 Se)]或[ R(H)PdCl 2 } 2 Se],15。另一方面,当配体14与HgCl 2反应时时,反应得到一个dimercurated selenolate复杂,μ双2,6-双[(二甲基氨基)甲基]