California Institute of Technology

Other

Cymetech, L.l.c.

Materia, Inc.

John P Morgan

Robert H Grubbs

Tae-Lim Choi

Arnab Kumar Chatterjee

Jason Lee Moore

Tina M Trnka

Janis Louie

Matthias Scholl

Andrew Bell

F Dean Toste

Daniel P Sanders

Jennifer A Love

Jennifer Ann Love

Steven D Goldberg

Diego Benitez

Christie Morrill

A tower and a wind turbine and be able to shoot water from the center point of a three to five blade wind turbine in a concentrated direction and from the blades to disperse water/fire retardant in a light to heavy spray from the tips of the blades covering a wider area for creating clean energy and suppressing wildfires.

Hydration turbine

Fixturing elements for positioning components on a work surface with a fixed or variable pitch are disclosed. The fixturing elements include a bottom portion adapted to be coupled directly or indirectly to the work surface and a top portion with a generally horizontally-extending slot or track. An insert is adapted to be positioned within the slot or track, which allows the insert to be slid or positioned at any number of positions along the slot or track. The insert may, for example, include a vertically-extending pin or a threaded hole that is adapted to receive other components. In some embodiments, the fixturing element may include an exterior side slot that opens into the slot or track, and a handle element may be inserted through the side slot and into the insert, allowing the inserted to be positioned using the handle element.

Part fixturing device with adjustable positioning

The invention pertains to the use of Group 8 transition metal carbene complexes as catalysts for olefin cross-metathesis reactions. In particular, ruthenium and osmium alkylidene complexes substituted with an N-heterocyclic carbene ligand are used to catalyze cross-metathesis reactions to provide a variety of substituted and functionalized olefins, including phosphonate-substituted olefins, directly halogenated olefins, 1,1,2-trisubstituted olefins, and quaternary allylic olefins. The invention further provides a method for creating functional diversity using the aforementioned complexes to catalyze cross-metathesis reactions of a first olefinic reactant, which may or may not be substituted with a functional group, with each of a plurality of different olefinic reactants, which may or may not be substituted with functional groups, to give a plurality of structurally distinct olefinic products. The methodology of the invention is also useful in facilitating the stereoselective synthesis of 1,2-disubstituted olefins in the cis configuration.

Cross-metathesis reaction of functionalized and substituted olefins using group 8 transition metal carbene complexes as metathesis catalysts

The invention pertains to the use of Group 8 transition metal alkylidene complexes as catalysts for olefin cross-metathesis reactions. In particular, ruthenium and osmium alkylidene complexes substituted with an N-heterocyclic carbene ligand and at least one electron donor ligand in the form of a heterocyclic group are used to catalyze cross-metathesis reactions to provide a olefin products that are directly substituted with an electron-withdrawing group.

Cross-metathesis of olefins directly substituted with an electron-withdrawing group using transition metal carbene catalysts

The invention provides a method for converting a less active or slower to initiate system to a higher activity system so that at the end of a polymerization the most active species is present in the system. The invention generally relates to a process for converting a less active or slower to initiate catalyst system to a higher activity catalyst system wherein the process comprises contacting a protected N-heterocyclic carbene with a metathesis catalyst and an olefin in the presence of energy. One of the benefits of the invention is that the amount of catalyst required is less than or lowered in the presence of the protected N-heterocyclic carbene as compared to the amount of catalyst required in the absence of the protected N-heterocyclic carbene. The protected N-heterocyclic carbene can be unsaturated or saturated. In addition, the invention describes novel ruthenium initiators and methods of making the same.

High activity metal carbene metathesis catalysts generated using a thermally activated N-heterocyclic carbene precursor

A catalytic method is provided for a ring-opening cross-metathesis reaction between a cycloolefinic substrate and a second olefinic reactant, wherein the catalyst used is a transition metal alkylidene complex substituted with an N-heterocyclic carbene ligand. The substrates are selected so that the rate of the cross-metathesis reaction of the second olefinic reactant, k , is greater than or equal to the rate of the ring-opening metathesis reaction, k . In this way, the predominant ROCM product is a monomer, dimer, and/or oligomer, but not a polymer. The invention additionally provides for selective production of an end-differentiated olefinic product, using trisubstituted cycloolefins as substrates and/or a subsequent cross-metathesis reaction following an initial ROCM step. The cycloolefinic substrates include low-strain olefins such as cyclohexene as well as higher strain olefins such as cyclooctene.

Selective ring-opening cross-metathesis of cycloolefins

Synthesis of functionalized and unfunctionalized olefins via cross and ring-closing metathesis

The invention provides a novel method for synthesizing transition metal carbene complexes useful as olefin metathesis catalysts. The method is a convenient one-pot synthesis in which transition metal carbenes are prepared in high yield from readily available starting materials via a dihydrogen complex containing two different anionic ligands, preferably a phosphine and a heteroatom-stabilized carbene. The invention additionally provides a method for synthesizing precursors to carbene ligands useful, inter alia, in the aforementioned one-pot synthesis. The precursors are in the form of trichloromethyl adducts of the formula L -CCl , where L is a heteroatom-stabilized carbene ligand, and are prepared by contacting an unsaturated, ionized analog of L-CCl with a non-nucleophilic base in the presence of chloroform.

One-pot synthesis of group 8 transition metal carbene complexes useful as olefin metathesis catalysts

Highly active metathesis catalysts generated in situ from inexpensive and air stable precursors

A mechanical torque enhancing assembly for increasing the torque output of a pulley. The mechanical torque enhancing assembly includes a drum assembly that has an interior space, a belt receiving groove that extends around an outer perimeter edge of the drum assembly, a converter plate, and a plurality of drive pins coupled to the interior space. The plurality of drive pins are each positioned proximate the belt receiving groove at a predetermined spaced distance from each other. A plurality of drive panels that have a first end and a second end are also positioned within the interior space of the drum assembly. The first end of each of the drive panels is coupled to an associated drive pin. The second end of each of the drive panels is coupled to the converter plate. Thus, when the drum assembly rotates each of the drive panels acts as a lever and the converter plate acts as a fulcrum thereby increasing the torque on the converter plate. In addition, the converter plate has an axle for providing rotational power.

Growing community of inventors

Pasadena, CA, United States of America

John P Morgan