Pd-catalyzed desulfitative and denitrogenative Suzuki-type reaction of arylsulfonyl hydrazides

A Pd-catalyzed desulfitative–denitrogenative coupling of arylsulfonyl hydrazides and arylboronic acids with the assistance of catalytic ligands is described. The reaction showed very good selectivity and tolerated a wide range of functionalities.

Advances in direct C–H arylation of 5,5- 6,5- and 6,6-fused-heterocycles containing heteroatoms (N, O, S)

This report aims to review the advances made in C–H arylation of 5,6, 6,6 and 5,5 fused-heterocyclic systems.

Efficient 2-sulfolmethyl quinoline formation from 2-methylquinolines and sodium sulfinates under transition-metal free conditions

An efficient approach for 2-sulfolmethyl quinoline formation from 2-methylquinolines and sodium sulfinates is described.

KO(t)Bu-mediated aerobic transition-metal-free regioselective β-arylation of indoles: synthesis of β-(2-/4-nitroaryl)-indoles

A KO(t)Bu-mediated intermolecular oxidative C-C coupling of nitroarenes with indoles is presented in DMSO at room temperature in an open flask. By using this mild and economical methodology, syntheses of β-(2/4-nitroaryl)-indoles with sensitive functionalities such as bromo, iodo, cyano, and nitro were achieved chemo- and regioselectively. Synthesized β-(2/4-nitroaryl) indoles were transformed into densely functionalized biindoles, indoloindoles, and (4-aminoaryl)-indoles which demonstrate post-transformation utility of the developed methodology.

Copper-catalysed Coupling of Aryl Tosylates with Sodium Arylsulfinates

Diaryl sulfones derivatives were easily synthesised from aryl tosylates and sodium arylsulfinates in high yields using [Cu(CH3CN)4]PF6 as catalyst. The transformation is efficient, simple and the starting materials are readily available.

Exploration of C-H and N-H-bond functionalization towards 1-(1,2-diarylindol-3-yl)tetrahydroisoquinolines

The synthesis of 1,2,3-trisubstituted indoles was investigated. More specifically, straightforward synthetic routes towards 1-(1,2-diarylindol-3-yl)-N-PG-THIQs (PG = protecting group, THIQ = tetrahydroisoquinoline) employing transition metal-catalyzed C-H and N-H-bond functionalization were explored. It was found that the synthesis of the target compounds is strongly dependent on the order of events. Hence, depending on the requirements of a synthetic problem the most suitable and promising pathway can be chosen. Additionally, a new synthetic approach towards 1,2-diarylindoles starting from 1-arylindole could be established in the course of our investigation by using a palladium-catalyzed protocol. Such 1,2-diarylindoles were successfully reacted with N-Boc-THIQ to furnish 1,2,3-trisubstituted indoles as target compounds. Furthermore, regioselective N-arylation of protected and unprotected 1-(indol-3-yl)-THIQs was successfully conducted using either simple iron or copper salts as catalysts.

Synthesis of Symmetrical Diaryl Sulfone by Homocoupling of Sodium Arylsulfinate

An efficient practical homocoupling reaction of sodium arylsulfinate promoted by Cu(II) is reported whereby symmetrical diaryl sulfone derivatives are obtained with high selectivity and reactivity by intermolecular cross-coupling. This homocoupling reaction is tolerant to many functional groups and proceeds under mild conditions.

Sulfinate derivatives: dual and versatile partners in organic synthesis

Recent advances in the preparation and synthetic uses of sulfinic acids and their derivatives are highlighted in this review. They are used as versatile partners in sulfonylative and desulfitative reactions.

Palladium-catalyzed tandem reaction of 2-hydroxyarylacetonitriles with sodium sulfinates: one-pot synthesis of 2-arylbenzofurans

Palladium-catalyzed desulfinative addition and intramolecular annulation tandem reactions of 2-hydroxyarylacetonitriles with sodium sulfinates for one-pot synthesis of 2-arylbenzofurans.

Palladium-catalyzed desulfitative C–P coupling of arylsulfinate metal salts and H-phosphonates

An efficient desulfitative C–P coupling was accomplished with versatile arylsulfinate metal salts and H-phosphonates.

A highly efficient and recyclable Fe3O4 magnetic nanoparticle immobilized palladium catalyst for the direct C-2 arylation of indoles with arylboronic acids

An efficient and reusable Fe₃O₄-nanoparticle-immobilized-palladium catalyst was prepared and applied to the direct C-2 arylation of indoles with arylboronic acids.

Palladium-catalyzed intermolecular desulfinylative cross-coupling of heteroaromatic sulfinates

Beauty lies in simplicity: An efficient and environmentally benign palladium-catalyzed protocol has been developed using a sulfinate as a nucleophilic coupling partner. The sulfinate position is arylated chemoselectively in very good yields. The bench-stable, non-hygroscopic heteroaromatic sulfinate salts rapidly undergo cross-coupling without the need of a co-catalyst, base, or additives (see scheme; mw = microwave).

Palladium-catalyzed desulfitative arylation by C-O bond cleavage of aryl triflates with sodium arylsulfinates

An efficient Pd-catalyzed desulfitative coupling reaction of sodium arylsulfinates as arylation reagents by C-O bond cleavage of aryl triflates was developed. With only 2 mol % of Pd(OAc)(2) as catalyst and XPhos as ligand, the reaction proceeded well for a range of substrates.