Pd-Catalyzed cascade cyclization of <i>o</i>-alkynylanilines <i>via</i> C–H/C–N bond cleavage leading to dibenzo[<i>a</i>,<i>c</i>]carbazoles
作者:Sheng Zhang、Hengmin Ma、Hon Eong Ho、Yoshinori Yamamoto、Ming Bao、Tienan Jin
DOI:10.1039/c8ob01386a
日期:——
A new and efficient Pd-catalyzed cascade cyclization of biaryl-tethered o-alkynylanilines for the formation of dibenzo[a,c]carbazole derivatives has been reported.
一种新颖高效的钯催化的双芳基连接的 o-炔基苯胺级联环化反应,用于合成二苯并[a,c]咔唑衍生物。
Synthesis of dibenzo[a,c]carbazoles from 2-(2-halophenyl)-indoles and iodobenzenes via palladium-catalyzed dual C–H functionalization
作者:Lijun Wu、Guobo Deng、Yun Liang
DOI:10.1039/c7ob01638g
日期:——
An efficient palladium-catalyzed strategy for the synthesis of dibenzo[a,c]carbazole derivatives has been developed. In the presence of Pd(OAc)2, 2-(2-halophenyl)-indoles and iodobenzenes proceeded smoothly to obtain the corresponding dibenzo[a,c]carbazoles in moderate to good yields. This methodology constructs two new C–C bonds via a palladium-catalyzed dual C–H functionalization.
Through-Space 1,4-Palladium Migration and 1,2-Aryl Shift: Direct Access to Dibenzo[<i>a</i>,<i>c</i>]carbazoles through a Triple CH Functionalization Cascade
作者:Samir Kumar Bhunia、Arghya Polley、Ramalingam Natarajan、Ranjan Jana
DOI:10.1002/chem.201503474
日期:2015.11.16
A palladium‐catalyzed expeditious synthesis of dibenzofused carbazoles from readily available 2‐arylindoles and diaryliodonium salts is reported. Interestingly, after the electrophilic C3 palladation of indole, an unexpected “through‐space” 1,4‐palladium migration to the 2‐aryl moiety, by remote CH bond activation followed by CH arylation with diaryliodonium salt, and an unprecedented 1,2‐aryl shift
Palladium-Catalyzed Synthesis of Triphenylenes via Sequential C–H Activation and Decarboxylation
作者:Yuzhong Yang、Bang Zhou、Xiaoming Zhu、Guobo Deng、Yun Liang、Yuan Yang
DOI:10.1021/acs.orglett.8b02310
日期:2018.9.7
A novel tandem intermolecular decarboxylative coupling reaction of o-bromobenzoic acids and aryl iodides has been developed. The method affords a range of unsymmetrically triphenylenes and displays unique regioselectivity and broad substrate scope. Mechanistically, palladium/norbornene-catalyzed C–H activation and subsequent double decarboxylative coupling reactions were involved. Moreover, the triphenylenes
palladium‐catalyzed intramolecularoxidativeCH/CH cross‐couplingreaction. This reaction provides a variety of π‐conjugated molecules bearing heteroatoms, such as nitrogen, oxygen, phosphorus, and sulfur atoms, and a carbonyl group. The π‐conjugated molecules were synthesized efficiently, even in gram scale, and larger π‐conjugated molecules were also obtained by a double CH/CH cross‐couplingreaction and successive
含杂原子的阶梯型π共轭分子的合成通过钯催化的分子内氧化性下成功地实现了 H / C ħ交叉偶联反应。该反应提供了各种带有杂原子(例如氮,氧,磷和硫原子)和羰基的π共轭分子。π共轭分子有效地合成,即使在克规模,以及较大的π共轭分子也由双C所得 H / C ħ交叉偶联反应和连续氧化cycloaromatization。