Carbonylative Hiyama coupling of aryl halides with arylsilanes under balloon pressure of CO

Palladium-Catalyzed Decarboxylative Cross-Couplings of Zinc Polyfluorobenzoates with Aryl 2-Pyridyl Esters for Accessing Polyfluorinated Aryl Ketones

An efficient decarboxylative cross-coupling of zinc polyfluorobenzoate with aryl 2-pyridyl ester under palladium catalysis, which enabled the convenient access to valuable polyfluorinated aryl ketones, was developed. The cross-coupling reactions proceeded effectively to give an array of polyfluorinated aryl ketones in moderate to excellent yields with a reasonable substrate scope and broad functional group tolerance. In addition, a one-pot reaction with the use of in situ formed zinc polyfluorobenzoate commencing from polyfluorobenzoic acid and Zn(OH)2 could be accomplished as well in a step-economical fashion. Moreover, the coupling protocol could also be successfully subjected to scale-up synthesis and readily applied in the late-stage functionalization of biologically active complex molecules.

Transition Metal Catalyzed Hiyama Cross-Coupling: Recent Methodology Developments and Synthetic Applications

Hiyama cross-coupling is a versatile reaction in synthetic organic chemistry for the construction of carbon-carbon bonds. It involves the coupling of organosilicons with organic halides using transition metal catalysts in good yields and high enantioselectivities. In recent years, hectic progress has been made by researchers toward the synthesis of diversified natural products and pharmaceutical drugs using the Hiyama coupling reaction. This review emphasizes the recent synthetic developments and applications of Hiyama cross-coupling.

Pd-Catalyzed decarboxylative alkynylation of alkynyl carboxylic acids with arylsulfonyl hydrazides via a desulfinative process

The decarboxylative alkynylation of alkynyl carboxylic acids and arylsulfonyl hydrazides by desulfinative coupling could provide aryl alkynes in satisfactory yields by either judiciously selecting palladium catalysts or modulating phosphine ligands under mild conditions.

Palladium-Catalyzed Insertion of Isocyanides into the C-S Bonds of Heteroaryl Sulfides

Insertion of tert-butyl isocyanide into the C(sp² )-S bonds of heteroaryl sulfides is catalyzed by a palladium diphosphine complex. Thioimidates generated through this reaction could be readily hydrolyzed under acidic conditions to yield the corresponding thioesters, which are of synthetic use. This insertion is useful because starting heteroaryl sulfides were readily prepared by either conventional ways or through sulfur-specific extended Pummerer reactions.

Denitrogenative palladium-catalyzed coupling of aryl halides with arylhydrazines under mild conditions

A novel, simple, and efficient protocol via Pd(ii)-catalyzed denitrogenative coupling of arylhydrazines with aryl halides under ambient and mild conditions.

Ag(i)/persulfate-catalyzed decarboxylative coupling of α-oxocarboxylates with organotrifluoroborates in water under room temperature

The decarboxylative coupling of α-oxocarboxylates and organotrifluoroborates was carried out smoothly in water under room temperature. This novel and simple method is efficient, using AgNO₃/K₂S₂O₈ catalytic system to generate diarylketone products.

Carbonylative coupling of aryl tosylates/triflates with arylboronic acids under CO atmosphere

The carbonylative Suzuki–Miyaura reaction between aryl tosylates/triflates with arylboronic acid is herein reported, using base-free conditions and a balloon pressure of carbon monoxide.