Patent classifications
C07C15/52
METHOD OF PREPARING SOLID-SUPPORTED PALLADIUM CATALYST
A solid-supported Pd catalyst is suitable for C—C bond formation, e.g., via Suzuki-Miyaura and Mizoroki-Heck cross-coupling reactions, with a support that is reusable, cost-efficient, regioselective, and naturally available. Such catalysts may contain Pd nanoparticles on jute plant sticks (GS), i.e., Pd@GS, and may be formed by reducing, e.g., K.sub.2PdCl.sub.4 with NaBH.sub.4 in water, and then used this as a “dip catalyst.” The dip catalyst can catalyze Suzuki-Miyaura and Mizoroki-Heck cross coupling-reactions in water. The catalysts may have a homogeneous distribution of Pd nanoparticles with average dimensions, e.g., within a range of 7 to 10 nm on the solid support. Suzuki-Miyaura cross-coupling reactions may achieve conversions of, e.g., 97% with TOFs around 4692 h.sup.−1, Mizoroki-Heck reactions with conversions of, e.g., a 98% and TOFs of 237 h.sup.−1, while the same catalyst sample may be used for 7 consecutive cycles, i.e., without addition of any fresh catalyst.
METHOD OF PREPARING SOLID-SUPPORTED PALLADIUM CATALYST
A solid-supported Pd catalyst is suitable for C—C bond formation, e.g., via Suzuki-Miyaura and Mizoroki-Heck cross-coupling reactions, with a support that is reusable, cost-efficient, regioselective, and naturally available. Such catalysts may contain Pd nanoparticles on jute plant sticks (GS), i.e., Pd@GS, and may be formed by reducing, e.g., K.sub.2PdCl.sub.4 with NaBH.sub.4 in water, and then used this as a “dip catalyst.” The dip catalyst can catalyze Suzuki-Miyaura and Mizoroki-Heck cross coupling-reactions in water. The catalysts may have a homogeneous distribution of Pd nanoparticles with average dimensions, e.g., within a range of 7 to 10 nm on the solid support. Suzuki-Miyaura cross-coupling reactions may achieve conversions of, e.g., 97% with TOFs around 4692 h.sup.−1, Mizoroki-Heck reactions with conversions of, e.g., a 98% and TOFs of 237 h.sup.−1, while the same catalyst sample may be used for 7 consecutive cycles, i.e., without addition of any fresh catalyst.
Jute stick-palladium nanoparticle dip catalysts useful for aqueous Suzuki-Miyaura and Mizoroki-Heck C—C bond formation
A solid-supported Pd catalyst is suitable for C—C bond formation, e.g., via Suzuki-Miyaura and Mizoroki-Heck cross-coupling reactions, with a support that is reusable, cost-efficient, regioselective, and naturally available. Such catalysts may contain Pd nanoparticles on jute plant sticks (GS), i.e., Pd@GS, and may be formed by reducing, e.g., K.sub.2PdCl.sub.4 with NaBH.sub.4 in water, and then used this as a “dip catalyst.” The dip catalyst can catalyze Suzuki-Miyaura and Mizoroki-Heck cross coupling-reactions in water. The catalysts may have a homogeneous distribution of Pd nanoparticles with average dimensions, e.g., within a range of 7 to 10 nm on the solid support. Suzuki-Miyaura cross-coupling reactions may achieve conversions of, e.g., 97% with TOFs around 4692 h.sup.−1, Mizoroki-Heck reactions with conversions of, e.g., a 98% and TOFs of 237 h.sup.−1, while the same catalyst sample may be used for 7 consecutive cycles, i.e., without addition of any fresh catalyst.
Jute stick-palladium nanoparticle dip catalysts useful for aqueous Suzuki-Miyaura and Mizoroki-Heck C—C bond formation
A solid-supported Pd catalyst is suitable for C—C bond formation, e.g., via Suzuki-Miyaura and Mizoroki-Heck cross-coupling reactions, with a support that is reusable, cost-efficient, regioselective, and naturally available. Such catalysts may contain Pd nanoparticles on jute plant sticks (GS), i.e., Pd@GS, and may be formed by reducing, e.g., K.sub.2PdCl.sub.4 with NaBH.sub.4 in water, and then used this as a “dip catalyst.” The dip catalyst can catalyze Suzuki-Miyaura and Mizoroki-Heck cross coupling-reactions in water. The catalysts may have a homogeneous distribution of Pd nanoparticles with average dimensions, e.g., within a range of 7 to 10 nm on the solid support. Suzuki-Miyaura cross-coupling reactions may achieve conversions of, e.g., 97% with TOFs around 4692 h.sup.−1, Mizoroki-Heck reactions with conversions of, e.g., a 98% and TOFs of 237 h.sup.−1, while the same catalyst sample may be used for 7 consecutive cycles, i.e., without addition of any fresh catalyst.
Stilbene derivative and method for preparing same
This invention relates to a stilbene derivative and a method of preparing the same, and more particularly to a novel stilbene derivative for inhibiting the function of cyclophilin, which is effective at the prevention of cyclophilin-related diseases or at the treatment of symptoms of such diseases, and to a method of preparing the same.
Stilbene derivative and method for preparing same
A stilbene derivative and a method of preparing the A stilbene derivative are disclosed. The stilbene derivative is provided for inhibiting the function of cyclophilin, which is effective at the prevention of cyclophilin-related diseases or at the treatment of symptoms of such diseases. The method of preparing a stilbene derivative includes reacting a phenylacetonitrile derivative with a benzaldehyde derivative.
Zwitterion-ruthenium complex for catalytic aerobic oxidation reactions
Zwitterion ligand metal complexes and methods of aerobic oxidation using a zwitterion ligand metal complex are provided. The zwitterion ligand metal complexes can include a transition metal salt and a zwitterion ligand, which can comprise a non-conjugated amide anion-phosphonium cation, an amide anion-ammonium cation, or an iminium cation. The methods of aerobic oxidation can include combining the zwitterion ligand metal complex with an oxidizable compound and molecular oxygen to allow the isolation of an oxidized compound from the oxidizable compound.
Zwitterion-ruthenium complex for catalytic aerobic oxidation reactions
Zwitterion ligand metal complexes and methods of aerobic oxidation using a zwitterion ligand metal complex are provided. The zwitterion ligand metal complexes can include a transition metal salt and a zwitterion ligand, which can comprise a non-conjugated amide anion-phosphonium cation, an amide anion-ammonium cation, or an iminium cation. The methods of aerobic oxidation can include combining the zwitterion ligand metal complex with an oxidizable compound and molecular oxygen to allow the isolation of an oxidized compound from the oxidizable compound.
Cobalt complexes, process for preparation and use thereof
The present invention discloses a cobalt compound of formula (I), a process for the preparation and use thereof. The present invention further relates to a pharmaceutical composition and a method inhibition of Tau Aggregation in a subject in need thereof using compound of formula (I). ##STR00001##
Cobalt complexes, process for preparation and use thereof
The present invention discloses a cobalt compound of formula (I), a process for the preparation and use thereof. The present invention further relates to a pharmaceutical composition and a method inhibition of Tau Aggregation in a subject in need thereof using compound of formula (I). ##STR00001##