Reactions of 1,1,2,2-tetrafluoroethyl-N,N-dimethylamine with linear and cyclic 1,3-diketones

Synthesis of Fluorinated Amide Derivatives via a Radical N-Perfluoroalkylation-Defluorination Pathway

A one-pot approach to fluorinated hydroxamic acid, amide, and thioamide derivatives is reported. The reaction proceeds via an N-perfluoroalkylation of nitrosoarenes with perfluoroalkanesulfinates, resulting in labile N-perfluoroalkylated hydroxylamines. By the addition of suitable additives, a controllable oxy/thiodefluorination of the fluorinated hydroxylamine intermediates was achieved. The method highlights N-perfluoroalkylated amines as versatile intermediates for further synthesis.

A physico-chemical investigation of fluorine-enriched quinolines

A homogenous series of 2,4-bis(fluoroalkyl)-substituted quinolines was synthesized under mild reaction conditions and their physico-chemical (absorption and emission, electrochemistry, and TD-DFT) properties were thoroughly investigated.

Fluoroalkyl Amino Reagents (FARs): A General Approach towards the Synthesis of Heterocyclic Compounds Bearing Emergent Fluorinated Substituents

Fluorinated heterocycles are important building blocks in pharmaceutical, agrochemical and material sciences. Therefore, organofluorine chemistry has witnessed high interest in the development of efficient methods for the introduction of emergent fluorinated substituents (EFS) onto heterocycles. In this context, fluoroalkyl amino reagents (FARs)—a class of chemicals that was slightly forgotten over the last decades—has emerged again recently and proved to be a powerful tool for the introduction of various fluorinated groups onto (hetero)aromatic derivatives.

Highly regioselective gold-catalyzed formal hydration of propargylic gem-difluorides

A highly regioselective gold-catalyzed formal hydration of propargylic gem-difluorides is presented.

Crystal structure of 3-(2,2-di-bromo-acet-yl)-4-hy-droxy-2H-chromen-2-one

In a new coumarin derivative obtained from the reaction of 3-acetyl-4-hy­droxy-2H-chromen-2-one with bromine in acetic acid, the hy­droxy group in involved in an intra­molecular O—H⋯O hydrogen bond. In the crystal, π–π inter­actions between the rings of the bicycle pack mol­ecules into stacks along the b axis.

The title compound, C₁₁H₆Br₂O₄, is a new coumarin derivative obtained from the reaction of 3-acetyl-4-hy­droxy-2H-chromen-2-one with bromine in acetic acid. The hy­droxyl group in involved in an intra­molecular O—H⋯O hydrogen bond. In the crystal, π–π inter­actions between the rings of the bicycle [inter­centroid distances = 3.498 (2) and 3.539 (2) Å] pack mol­ecules into stacks along the b axis, and weak inter­molecular C—H⋯O hydrogen bonds further link these stacks into layers parallel to the ab plane.