Abstract:
The present disclosure describes methods for silylating aromatic organic substrates, and associated chemical systems, said methods comprising or consisting essentially of contacting the aromatic organic substrate with a mixture of (a) at least one organosilane and (b) at least one strong base, under conditions sufficient to silylate the aromatic substrate.
Abstract:
The present invention is directed to a mild, efficient, and general direct C(sp)-H bond silylation. Various embodiments includes methods, each method comprising or consisting essentially of contacting at least one organic substrate comprising a terminal alkynyl C—H bond, with a mixture of at least one organosilane and an alkali metal hydroxide, alkali metal alkoxide, or alkali metal hydride under conditions sufficient to form a silylated terminal alkynyl moiety. The methods are operable in the presence or substantially absence of transition-metal compounds. The systems associated with these methods are also disclosed.
Abstract:
The present invention describes chemical systems and methods for silylating aromatic organic substrates, said system or method comprising or consisting essentially of a mixture of (a) at least one organosilane and (b) at least one strong base, the definition of strong base now also including hydroxide, especially KOH, said system being preferably, but not necessarily substantially free of a transition-metal compound, and said methods comprising contacting a quantity of the organic substrate with a mixture of (a) at least one organosilane and (b) at least one strong base, under conditions sufficient to silylate the aromatic substrate; wherein said system is substantially free of a transition-metal compound.
Abstract:
The disclosure provides methods and materials suitable for preparing coating layers on substrates. The coatings comprise quaternary amine groups and therefore impart anti-bacterial properties to the substrate. in one embodiment, for example, there is provided a quaternary amine-containing polymeric coating comprising propylene and ethylene repeat units.
Abstract:
This disclosure is directed to structured compositions, including DNA-functionalized scaffolds, for drug capture, and methods and devices for sequestering chemotherapeutics from physiological fluids using the functionalized scaffolds.
Abstract:
The present invention is directed to a mild, efficient, and general direct C(sp)-H bond silylation. Various embodiments includes methods, each method comprising or consisting essentially of contacting at least one organic substrate comprising a terminal alkynyl C—H bond, with a mixture of at least one organosilane and an alkali metal hydroxide, under conditions sufficient to form a silylated terminal alkynyl moiety. The methods are operable in the substantially absence of transition-metal compounds. The systems associated with these methods are also disclosed.
Abstract:
The disclosure provides a dual-catalysis system for direct conversion of olefins to alcohols. The cooperative catalytic system contains one oxidizing catalyst and one transfer-hydrogenation catalyst. A wide variety of olefins, including aromatic and aliphatic olefins, can be used as the reactant. The transformation proceeds with anti-Markovnikov selectivity, and in some aspects provides primary alcohols as major products. The disclosure further provides a system for oxidation of olefins with anti-Markovnikov selectivity.
Abstract:
The present inventions are directed to novel aqueous compositions comprising a copolymer having water-soluble units and pendant catechols, said composition adapted for use on mammalian tissue and having a lower critical solubility temperature (LCST) of less than a physiological temperature, and their use, for example, in removing foreign particles from tissue surfaces, including ocular surfaces.
Abstract:
The present invention provides photosensitive compositions and methods of patterning a polymeric image on a substrate, said methods comprising; (a) depositing a layer of photosensitive composition of any one of claims 15 to 22 on the substrate; and (b) irradiating a portion of the layer of photosensitive composition with a light comprising a wavelength in a range of from about 220 to about 440 nm. The invention also relates to methods of metathesizing an unsaturated organic precursor comprising irradiating Fischer-type carbene ruthenium catalysts with at least one wavelength of light in the presence of at least one unsaturated organic precursor so as to metathesize at least one alkene or one alkyne bond.
Abstract:
The disclosure describes a polymer brush structure exhibiting birefringence, said polymer brush structure comprising a plurality of substantially parallel oriented polymers and characterized by a longitudinal z-direction having a first refractive index, nz, and a lateral x,y-direction having a second refractive index, nx,y, wherein the difference, Δn, between the first refractive index and the second refractive index is in a range of about 0.1 to about 0.6, as measured by ellipsometry and fit to a Cauchy analytical model.