Glycinamide hydrochloride as a transient directing group: Synthesis of 2-benzylbenzaldehydes by C(sp<sup>3</sup>)−H arylation
作者:Fei Wen、Zheng Li
DOI:10.1080/00397911.2020.1802759
日期:2020.11.16
Abstract Glycinamide hydrochloride as an inexpensive and commercially available transientdirectinggroup for the C(sp3)−Harylation of 2-methylbenzaldehydes is described. A series of practical 2-benzylbenzaldehydes bearing various functional groups are efficiently synthesized in satisfactory yield by this strategy. This method can also be extended to gram scale. Graphical Abstract
Semicarbazide: A Transient Directing Group for C(
<i>sp</i>
<sup>3</sup>
)−H Arylation of 2‐Methylbenzaldehydes
作者:Fei Wen、Zheng Li
DOI:10.1002/adsc.201901392
日期:2020.1.7
Semicarbazide as an effective transientdirectinggroup for C(sp3)−Harylation of 2‐methylbenzaldehydes is described. Various substituted 2‐benzylbenzaldehydes are efficiently synthesized by this strategy. The salient features of this protocol are the use of inexpensive transientdirectinggroup, wide scope of substrates with good functional group compatibility, up to 98% yield, and applicability to
Nano palladium catalyzed C(sp3) H bonds arylation by a transient directing strategy
作者:Jianxia Chen、Chaolumen Bai、Hongpeng Ma、Dan Liu、Yong-Sheng Bao
DOI:10.1016/j.cclet.2020.02.055
日期:2021.1
Abstract Reported herein is the first example of heterogeneous palladium catalyzed C(sp3)-H bonds arylation by a transient-ligand-directed strategy. Using supported palladium (metallic state) nanopariticles as catalyst, a wide range of aryl iodides undergo the coupling with various o-methylbenzaldehyde derivatives to assemble a library of highly selective and functionalized o-benzylbenzaldehydes. The
Palladium-catalyzed benzylic C(sp3)–H arylation of o-alkylbenzaldehydes
作者:Lan Lei、Ping Wu、Zhuqing Liu、Jiang Lou
DOI:10.1016/j.tetlet.2021.152865
日期:2021.3
The palladium-catalyzed benzylic C(sp3)–H arylation of o-alkylbenzaldehyde derivatives was achieved utilizing 2-dimethylaminoethylamine as a novel transient directing group. The γ-C(sp3)–H arylation reaction efficiently afforded a variety of arylated o-alkylbenzaldehydes and polycyclic aromatic hydrocarbons (PAHs) in one pot, exhibiting high functional group tolerance with broad substrate scope. The
A new synthetic strategy was successfully developed for highly efficient construction of triphenylamine-substituted polycyclic aromatic hydrocarbons (PAHs), including anthracenes, tetraphenes, pent...