A facile transformation of aryl aldehydes to benzyl iodides through one-pot reductive iodination is reported. This protocol displays remarkable functional group tolerance and the title compound was obtained in good to excellent yield.
Deconjugative alkylation/Heck reaction as a simple platform for dihydronaphthalene synthesis
作者:Primali V. Navaratne、Alexander J. Grenning
DOI:10.1039/c6ob02250b
日期:——
A simple platform for carbocycle synthesis by Knoevenagel adduct deconjugative alkylation/Heckreaction is described. Deconjugative alkylation of Knoevenagels adducts is two-fold synthetically enabling because C–C bond formation is (1) operationally simple due to the ease of Knoevenagel adduct carbanion generation and (2) results in alkene migration, which poises the substrate for cyclization. Furthermore
Intramolecular Formal<i>anti</i>-Carbopalladation/Heck Reaction: Facile Domino Access to Carbo- and Heterooligocyclic Dienes
作者:Martin Pawliczek、Bastian Milde、Peter G. Jones、Daniel B. Werz
DOI:10.1002/chem.201502327
日期:2015.8.24
An intramolecular domino process consisting of a formal anti‐carbopalladation followed by Heck reaction is realized. Complex oligo(hetero)cyclic scaffolds are efficiently obtained in one synthetic step from easily obtainable enyne precursors. In contrast to common syn‐carbopalladation reactions of alkyne units, the carbopalladation employed here is designed to afford an anti‐arrangement of the two
<i>N</i>-Hydroxyphthalimide-Mediated Electrochemical Iodination of Methylarenes and Comparison to Electron-Transfer-Initiated C–H Functionalization
作者:Mohammad Rafiee、Fei Wang、Damian P. Hruszkewycz、Shannon S. Stahl
DOI:10.1021/jacs.7b09744
日期:2018.1.10
electrochemical method has been developed for selective benzylic iodination of methylarenes. The reactions feature the first use of N-hydroxyphthalimide as an electrochemical mediator for C-H oxidation to nonoxygenated products. The method provides the basis for direct (in situ) or sequential benzylation of diverse nucleophiles using methylarenes as the alkylating agent. The hydrogen-atom transfer mechanism for
Synthesis of benzo- and naphtho-fused bicyclo[n.3.1]alkane frameworks with a bridgehead nitrogen function by palladium-catalyzed intramolecular α′-arylation of α-nitroketones
作者:Giorgio Giorgi、Swarupananda Maiti、Pilar López-Alvarado、J. Carlos Menéndez
DOI:10.1039/c0ob00526f
日期:——
The C-alkylation of cyclic α-nitroketones with α-halobenzyl halides in the presence of DBU followed by a Pd-catalyzed intramolecular C-arylation afforded benzo-and naphtho-fused bicyclo[n.3.1]alkane derivatives (n = 3, 4, 5) in excellent overall yields for the two-step sequence. In some of the reactions starting from α-nitrocyclooctanone, the major products were fused indane derivatives arising from an intramolecular attack of an intermediate Pd species onto the carbonyl group, followed by elimination.