Abstract:
The synthesis of difluoromethyl ethers and sulfides with a simple, non-ozone-depleting reagent is described. The difluoromethylation of phenols with this reagent occurs at room temperature within minutes with exceptional functional group tolerance. The mild conditions makes possible tandem processes for the conversion of aryl boronic acids, aryl halides and arenes to difluoromethyl ethers. Mechanistic studies support a reaction pathway involving nucleophilic attack of the phenolate to difluorocarbene.
Abstract:
Present invention relates to a method of preparing a chiral α- or β-substituted ketone from the corresponding β- or γ-substituted aldehyde, wherein the ketone has formula (I), (III) or (V), and the corresponding aldehyde has formula (II), (IV) or (VI), respectively, the method comprising reacting the aldehyde of formula (II), (IV) or (VI) in the presence of an amine, oxygen and an organic solvent, wherein the reaction is carried out in the absence of a metal-based catalyst or a metal-based oxidant, wherein: R is H, a substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C15 alkenyl, substituted or unsubstituted C2-C15 alkynyl, substituted or unsubstituted C3-C15 cycloalkyl, substituted or unsubstituted C3-C15 cycloalkenyl, substituted or unsubstituted C3-C15 heterocycloalkyl, substituted or unsubstituted C3-C15 heterocycloalkenyl, substituted or unsubstituted C6-C15 aryl, or substituted or unsubstituted C6-C15 heteroaryl; and R′ is H, a substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C15 alkenyl, substituted or unsubstituted C2-C15 alkynyl, substituted or unsubstituted C3-C15 cycloalkyl, substituted or unsubstituted C3-C15 cycloalkenyl, substituted or unsubstituted C3-C15 heterocycloalkyl, substituted or unsubstituted C3-C15 heterocycloalkenyl, substituted or unsubstituted C6-C15 aryl, or substituted or unsubstituted C6-C15 heteroaryl.
Abstract:
A molecular species is covalently attached to elemental carbon by exposing the carbon to a reaction mixture containing a strong base and a compound of the formulaor in which X denotes a covalently attached atom or group capable of forming an X− anion and each Z is a moiety comprising a plurality of atoms, but which does not have a hydrogen atom directly attached to the atom which itself is directly attached to the —CH2X or —CHX group. The carbon substrate may be graphite or carbon nanotubes.
Abstract:
The invention relates to palladium(0)-tris{tri-[3,5-bis(trifluoromethyl)-phenyl]-phosphine} complex of formula (I), as well as to its preparation and use. This compound is outstandingly stable, and can be used as catalyst with excellent results.
Abstract:
Disclosed herein is a single step catalytic process for the production of enantiomerically pure α-Aryloxy-α′-Azido/Alkoxy alcohols of formula (A). The invention, in particular discloses phenolytic kinetic resolution of racemic anti and syn azido/alkoxy epoxides to generate two stereocentres of high optical purities of formula (A).
Abstract:
An object of the present invention is to efficiently produce an optically active bicyclic compound. The optically active bicyclic compound is efficiently produced using an enzyme.
Abstract:
This disclosure is directed to methods of preparing organic aldehydes, each method comprising contacting a terminal olefin with an oxidizing mixture comprising: (a) a dichloro-palladium complex; (b) a copper complex; (c) a source of nitrite; under aerobic reaction conditions sufficient to convert at least a portion of the terminal olefin to an aldehyde.
Abstract:
The disclosure relates to TAK1 inhibitors, compositions, and uses related thereto. In certain embodiments, the disclosure relates to compounds of formula (I), pharmaceutical compositions having a compound of formula (I), and methods of treating or preventing cancer by administering an effective amount of a pharmaceutical composition having a compound of formula (I) to a subject in need thereof.
Abstract:
An azole derivative according to the invention is represented by Formula (I), wherein each of Ra and Rb denotes a hydrogen atom, or a C1-C6 alkyl group, a C2-C6 alkenyl group or a C2-C6 alkynyl group; Ra and Rb may be substituted with Xa or Xb which is a halogen atom; each of na and nb denotes 0 or the number of Xa- or Xb-substituted hydrogen atoms among the hydrogen atoms in Ra or Rb; each Y denotes a halogen atom, a C1-C4 alkyl group, a C1-C4 haloalkyl group, a C1-C4 alkoxy group, a C1-C4 haloalkoxy group, a phenyl group, a cyano group or a nitro group; m denotes 0 to 5; and A denotes a nitrogen atom or a methyne group. As a result, an azole derivative contained as an active ingredient in an agro-horticultural agent having an excellent controlling effect on diseases can be provided.