Abstract: The present invention provides methods for preparing Favipiravir (6-fluoro-3-hydroxypyrazine-2-carboxamide).

Abstract: The present invention provides methods for preparing Favipiravir (6-fluoro-3-hydroxypyrazine-2-carboxamide).

Abstract: This disclosure relates generally to the facile and selective mono-perfluoro and poly-fluoroarylation of Meldrum's acid to generate a versatile synthon for highly fluorinated alpha-phenyl acetic acid derivatives which provide straightforward access to fluorinated building blocks. The reaction takes place quickly and all products were isolated without the need for chromatography. An embodiment provides an alternative strategy to access alpha-arylated Meldrum's acids which avoids the need for aryl-Pb(IV) salts or diaryliodonium salts and provides access to the tertiary product which was not previously synthetically accessible. The synthetic versatility and utility of the Meldrum's acid products is demonstrated by subjecting the products to several derivatizations of the Meldrum's acid products as well as photocatalytic hydrodefluorination which provide access to difficult but valuable synthetic targets such as multifluorinated aromatics.

Abstract: Methods of synthesizing and isolating facial-tris-homoleptic phenylpyridinato iridium (III) photocatalysts are disclosed. Also disclosed are methods of recovering excess 2-phenylpyridine ligands from said syntheses.

Abstract: Methods of synthesizing compounds comprising fluorinated aryl groups are disclosed, wherein said methods utilize hydrogen bond directed photocatalytic hydrodefluorination.

Abstract: Methods of synthesizing and isolating facial-tris-homoleptic phenylpyridinato iridium (III) photocatalysts are disclosed. Also disclosed are methods of recovering excess 2-phenylpyridine ligands from said syntheses.

Abstract: Methods of synthesizing polyfluorinated amino acid derivatives are disclosed, along with polyfluorinated amino acid derivatives produced from said methods, as well as compositions containing same. The synthesis methods utilize an oxazolone and a perfluoroarene to produce the polyfluorinated amino acid derivatives.

Abstract: Methods of synthesizing polyfluorinated amino acid derivatives are disclosed, along with polyfluorinated amino acid derivatives produced from said methods, as well as compositions containing same. The synthesis methods utilize an oxazolone and a perfluoroarene to produce the polyfluorinated amino acid derivatives.

Abstract: This disclosure relates generally to the facile and selective mono-perfluoro and poly-fluoroarylation of Meldrum's acid to generate a versatile synthon for highly fluorinated alpha-phenyl acetic acid derivatives which provide straightforward access to fluorinated building blocks. The reaction takes place quickly and all products were isolated without the need for chromatography. An embodiment provides an alternative strategy to access alpha-arylated Meldrum's acids which avoids the need for aryl-Pb(IV) salts or diaryliodonium salts and provides access to the tertiary product which was not previously synthetically accessible. The synthetic versatility and utility of the Meldrum's acid products is demonstrated by subjecting the products to several derivatizations of the Meldrum's acid products as well as photocatalytic hydrodefluorination which provide access to difficult but valuable synthetic targets such as multifluorinated aromatics.

Abstract: This disclosure relates generally to the facile and selective mono-perfluoro and -polyfluoroarylation of Meldrum's acid to generate a versatile synthon for highly fluorinated alpha-phenyl acetic acid derivatives which provide straightforward access to fluorinated building blocks. The reaction takes place quickly and all products were isolated without the need for chromatography. An embodiment provides an alternative strategy to access alpha-arylated Meldrum's acids which avoids the need for aryl-Pb(IV) salts or diaryliodonium salts and provides access to the tertiary product which was not previously synthetically accessible. The synthetic versatility and utility of the Meldrum's acid products is demonstrated by subjecting the products to several derivatizations of the Meldrum's acid products as well as photocatalytic hydrodefluorination which provide access to difficult but valuable synthetic targets such as multifluorinated aromatics.

Abstract: The invention provides Formula I compounds, and its compositions, wherein HG, X, L, Y, m, and n are defined in the specification, as fluid efficiency and flow back enhancers for use in a method of treating subterranean formations.

Abstract: Various embodiments disclosed related to compositions and methods of using the same for treating subterranean formations. In various embodiments, the present invention provides a method of treating a subterranean formation. The method includes placing in a subterranean formation a composition that includes a viscosifier and that also includes a hydrophobically-modified polymer including at least one nitrogen-containing repeating unit.

Abstract: Methods including introducing a particulate-stabilized emulsion into a subterranean formation having a mineralogy profile, wherein the particulate-stabilized emulsion comprises: an external phase, an internal phase comprising a surfactant, and particulates at an interface between the internal phase and the external phase, thereby forming internal phase surfactant droplets surrounded with the particulates and suspended within the external phase, wherein at least a portion of the particulates are composed of a mineral-containing material selected to mimic at least a portion of the mineralogy profile of the subterranean formation; and destabilizing the particulate-stabilized emulsion to release the surfactant from the internal phase surfactant droplets.

Abstract: Various embodiments disclosed relate to treatment fluids comprising a compound of the formula (I): wherein G1, G2, L1, L2, L3, q, and r are defined herein. Various other embodiments relates to methods of treating subterranean formations with such treatment fluids.

Abstract: A method of treating a well, the method including forming in-situ or using a polymeric material in a treatment fluid that is introduced into a well, wherein the polymeric material is produced by reacting: (a) a polysaccharide, wherein each molecule of the polysaccharide has at least one reducing chain end; and (b) a chain connector, wherein each molecule of the chain connector has at least two functional groups for reacting with the reducing end of the polysaccharide.

Abstract: Various embodiments disclosed related to compositions and methods of using the same for treating subterranean formations. In various embodiments, the present invention provides a method of treating a subterranean formation. The method includes placing in a subterranean formation a composition that includes a viscosifier and that also includes a hydrophobically-modified polymer including at least one nitrogen-containing repeating unit.

Abstract: The invention provides Formula I compounds, and its compositions, wherein HG, X, L, Y, m, and n are defined in the specification, as fluid efficiency and flow back enhancers for use in a method of treating subterranean formations.

Abstract: Methods or systems of protecting against scale formation in a well. The methods or systems include: coating a coating material onto the surface of a particulate, wherein the coating material includes a double hydrophilic block copolymer; and contacting a fluid comprising scale-forming ions with the particulate. The coated particulate can be positioned in the well or a well servicing fluid can be flowed through the coated particulate prior to introducing the fluid into the well.

Abstract: Methods or systems of protecting a surface of a metallic body against scale formation in a well or pipeline are provided. The methods include the steps of: coating a coating material onto the surface of the metallic body, wherein the coating material includes a double hydrophilic block copolymer; and positioning the metallic body in a wellbore of a well or to form a portion of a pipeline.

Abstract: Methods of protecting a surface of a metallic body against scale formation in a well or pipeline including the steps of: vapor depositing a source material comprising a metal oxide onto the surface of the metallic body; and positioning the metallic body in a wellbore of a well or to form a portion of a pipeline.