Palladium-Catalyzed Cross-Coupling of Benzyl Ketones and<i>α,β</i>-Unsaturated Carbonyl and Phenolic Compounds with<i>o</i>-Dibromobenzenes to Produce Cyclic Products
A number of carbonyl and phenolic compounds efficiently couple with o-dibromobenzenes in the presence of a palladium catalyst and a base to give the corresponding oxygen-containing heterocycles or carbocyclic compounds. Thus, from the reactions of benzyl phenyl ketones, 1-naphthols, and α,β-unsaturated aldehydes and ketones, benzofuran, benzopyran, benzocyclobutane, and indene derivatives, respectively, are produced selectively via the successive formation of C–C and C–O bonds or of two C–C bonds.
A novel Cu-catalyzed intramolecular aryl-etherification reaction of alkoxyl alkynes with diaryliodonium salts is realized. The reactions proceed smoothly to produce valuable oxo-heterocycles with readily available linear starting materials via cleavage of a stable C-O bond.
One-Pot Synthesis of 2,3-Diarylbenzofurans via Sequential Iodocyclization and Pd-Catalyzed Suzuki Coupling Reactions of 2-Alkynylanisoles with Boronic Acids in Water
Abstract An efficient approach for the one-pot synthesis of 2,3-diarylbenzofurans via sequential iodocyclization and Pd-catalyzed Suzuki couplingreaction of 2-alkynylanisoles with boronic acids in water is reported. The protocol utilizes water as the solvent and there is no need to isolate the intermediate 3-iodine-2-arylbenzofurans, which exemplifies the ideal of green chemistry. Various 2-alkynylanisoles
A facile one-pot synthesis of 2,3-diarylated benzo[b]furans via relay NHC and palladium catalysis
作者:Yanyan Jia、Tuanjie Li、Chenxia Yu、Bo Jiang、Changsheng Yao
DOI:10.1039/c5ob02336j
日期:——
An efficient one-pot synthesis of 2,3-diarylated benzo[b]furans was realized through the relay catalysis of N-Heterocyclic Carbene (NHC) and palladium from substituted 2′-bromodiphenylbromomethanes and aryl aldehydes. The easy availability of the starting materials, good compatibility of catalysts, convergent assembly and concomitant modification of the target scaffold, and potential utilization value
通过取代2'-溴二苯基溴甲烷和芳基醛对N-杂环卡宾(NHC)和钯的中继催化作用,实现了有效的一锅法合成2,3-二芳基苯并[ b ]呋喃。起始原料的容易获得,催化剂的良好相容性,目标支架的收敛组装和伴随的修饰以及产物的潜在利用价值,使得该策略在有机合成中具有吸引力。
Montfort, Bernard; Laude, Bernard; Vebrel, Joel, Bulletin de la Societe Chimique de France, 1987, # 5, p. 848 - 854
作者:Montfort, Bernard、Laude, Bernard、Vebrel, Joel、Cerutti, Ernest