Rhodium-catalyzed Synthesis of Benzo[<i>b</i>]thiophene-3-carboxamides via Cyclization of (<i>ortho</i>-Alkynyl)phenyl Sulfides in the Presence of Isocyanates
A facile synthesis of benzo[b]thiophene-3-carboxamides from (ortho-alkynyl)phenyl methoxymethyl sulfides and isocyanates was realized. The method involves a tandem-type, cyclization–addition sequen...
A cyclization–carbonylation–cyclization coupling reaction of (ortho-alkynyl phenyl) (methoxymethyl) sulfides with the palladium(<scp>ii</scp>)-bisoxazoline catalyst
A cyclization–carbonylation–cyclizationcouplingreaction (CCC-coupling reaction) of (o-alkynylphenyl) (methoxymethyl) sulfides, catalyzed by (box)PdII complexes, afforded symmetrical ketones bearing two benzo[b]thiophene groups in good to excellent yields. This method is applicable to a broad range of substrates.
(盒)Pd II配合物催化(邻-炔基苯基)(甲氧基甲基)硫化物的环化-羰基化-环化偶联反应(CCC偶联反应),得到带有两个苯并[ b ]噻吩基团的对称酮,收率好至极佳。该方法适用于广泛的基材。
Pd(<scp>ii</scp>)-catalyzed ligand controlled synthesis of pyrazole-4-carboxylates and benzo[b]thiophene-3-carboxylates
A simple change of the ligand and solvent allows controlled, effective switching between cyclization–carbonylation–cyclization-coupling (CCC-coupling) and cyclization–carbonylation reactions.
The first example of an asymmetric cyclization–dimerization of (ortho‐alkynyl phenyl) (methoxymethyl) sulfides with a palladium(II) bisoxazoline (box) catalyst has been developed. The box ligand enhances the alkynophilicity of benzothienyl palladium(II) intermediate A and thus promotes coordination of the second alkyne substrate, leading to the dimerization. The characteristic properties of the box
Palladium(II) Catalyzed Cyclization-Carbonylation-Cyclization Coupling Reaction of (ortho-Alkynyl Phenyl) (Methoxymethyl) Sulfides Using Molecular Oxygen as the Terminal Oxidant
system was developed that uses environmentally friendly molecular oxygen as the terminal oxidant to catalyze the cyclization-carbonylation-cyclization coupling reaction (CCC-coupling reaction) of (o-alkynyl phenyl) (methoxymethyl) sulfides.