Patents Assigned to Kanata Chemical Technologies Inc.
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Patent number: 9115249Abstract: The present disclosure relates to processes and methods of generating hydrogen via the dehydrocoupling of amine boranes using ligand-stabilized homogenous metal catalysts. The amine-borane is shown by the formula (I), R1R2N—BHR3R4. A process is also shown for the preparation of a linear, branched or cyclic polymer which comprises a repeating unit of the formula (II), —[R1R2N—BR3R4]-n, by reacting HR1R2N—BHR3R4 in the presence of at least one ligand-stabilized metal catalyst.Type: GrantFiled: May 15, 2009Date of Patent: August 25, 2015Assignee: Kanata Chemical Technologies Inc.Inventors: Kamaluddin Abdur-Rashid, Todd Graham, Chi-Wing Tsang, Xuanhua Chen, Rongwei Guo, Wenli Jia
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Patent number: 9062085Abstract: The present disclosure relates to biaryl diphosphine ligands of the formula (B), processes for the production of the ligands and the use of the ligands in metal catalysts for asymmetric synthesis. The disclosure also relates to intermediates used for the production of the biaryl diphosphine ligand.Type: GrantFiled: September 9, 2011Date of Patent: June 23, 2015Assignee: Kanata Chemical Technologies Inc.Inventors: Kamaluddin Abdur-Rashid, Wenli Jia, Shuiming Lu, Rongwei Guo, Xuanhua Chen, Dino Amoroso
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Patent number: 8716508Abstract: The present disclosure relates to a method for preparing a metal catalyst comprising at least one ligand that is coordinated to the metal through at least one phosphorous (P) atom and at least one nitrogen (N) atom, the method comprising reacting a metal pre-cursor complex with an acid addition salt of an aminophosphine, diaminophosphine, aminodiphosphine or diaminodiphosphine, in the presence of a base.Type: GrantFiled: October 8, 2009Date of Patent: May 6, 2014Assignee: Kanata Chemical Technologies Inc.Inventors: Kamaluddin Abdur-Rashid, Dino Amoroso, Xuanhua Chen, Rongwei Guo, Shuiming Lu, Chi-Wing Tsang
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Patent number: 8658825Abstract: The present application is directed to i) a method for synthesizing aminophosphine (P,N) and phosphine-aminophosphine (P,N,P) ligands, ii) the use of such ligands in the preparation of metal complexes as hydrogenation catalysts, and iii) aminophosphine (P,N) and phosphine-aminophosphine (P,N,P) ligands of various structures. In particular, the methods in i) involve reacting a protected tertiary amine of formula (I) with a metal phosphide of the formula Y—PR8R9 to afford an aminophosphine of formula (II), which can then be optionally further reacted with a phosphine of the formula (III) to afford the phosphine-aminophosphine of formula (IV).Type: GrantFiled: June 9, 2008Date of Patent: February 25, 2014Assignee: Kanata Chemical Technologies Inc.Inventors: Kamaluddin Abdur-Rashid, Rongwei Guo, Xuanhua Chen, Wenli Jia
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Patent number: 8518368Abstract: The present disclosure relates to processes and methods of generating hydrogen via the hydrolysis or solvolyis of a compound of the formula (I), R1R2HNBHR3R4, using ligand-stabilized homogeneous metal catalysts.Type: GrantFiled: May 16, 2008Date of Patent: August 27, 2013Assignee: Kanata Chemical Technologies Inc.Inventors: Kamaluddin Abdur-Rashid, Todd Graham, Chi-Wing Tsang, Xuanhua Chen, Rongwei Guo, Wenli Jia, Dino Amoroso, Christine Sui-Seng
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Publication number: 20130184479Abstract: The present disclosure relates to biaryl diphosphine ligands of the formula (B), processes for the production of the ligands and the use of the ligands in metal catalysts for asymmetric synthesis. The disclosure also relates to intermediates used for the production of the biaryl diphosphine ligand.Type: ApplicationFiled: September 9, 2011Publication date: July 18, 2013Applicant: KANATA CHEMICAL TECHNOLOGIES INC.Inventors: Kamaluddin Abdur-Rashid, Wenli Jia, Shuiming Lu, Rongwei Guo, Xuanhua Chen, Dino Amoroso
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Patent number: 8232430Abstract: The present disclosure relates to a method for the stereoselective production of cis-4-tertbutylcyclohexanol comprising contacting 4-tert-butylcyclohexanone with hydrogen gas, a catalyst comprising a ruthenium-aminophosphine complex and a base, wherein the complex is of the formula RuX2(PNH2)a(P2)b (I), wherein X is anionic ligand, (PNH2) represents an aminophosphine ligand of the formula (II) R1R2P-L-NH2 and (P2) represents a diphosphine ligand of the formula (III) R3R4P-L-PR5R6.Type: GrantFiled: July 7, 2008Date of Patent: July 31, 2012Assignee: Kanata Chemical Technologies Inc.Inventors: Kamaluddin Abdur-Rashid, Xuanhua Chen, Rongwei Guo, Wenli Jia
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Patent number: 8143451Abstract: The present invention relates to a method for the preparation of tertiary carbinamine compounds from diastereoselective allylation and crotylation of N-unsubstituted imines derived from ketones.Type: GrantFiled: October 4, 2007Date of Patent: March 27, 2012Assignee: Kanata Chemical Technologies Inc.Inventors: Avinash N. Thadani, Bhartesh Dhudshia
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Publication number: 20110105693Abstract: Disclosed are cationic ruthenium arene complexes of Formula (I): [Ru(D-Z1—NHR1)(Ar)(LB)n]r+[Y?]r, wherein Ar is optionally substituted aryl, D-Z1—NHR1 is a coordinated bidentate ligand wherein D, Z1, R1 and R2 are as defined herein, and where R1 and Ar, or R2 and Ar may be linked together, n is 0 or 1, r is 1 or 2, LB is a neutral Lewis base, and Y is a non-coordinating anion. The complexes are active catalysts for reduction reactions, including the transfer-hydrogenation of carbon-oxygen (C?O) and carbon-nitrogen (C?N) double bonds.Type: ApplicationFiled: May 1, 2009Publication date: May 5, 2011Applicant: KANATA CHEMICAL TECHNOLOGIES INC.Inventors: Kamaluddin Abdur-Rashid, Dino Amoroso, Christine Sui-Seng, Wenli Jia, Charles Ewart
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Patent number: 7777083Abstract: A process for the reduction of compounds comprising one or more carbon-oxygen (C?0) double bonds, to provide the corresponding alcohol, comprising contacting the compound with hydrogen gas at a pressure greater than 3 atm and a catalyst comprising an iridium aminodiphosphine complex.Type: GrantFiled: May 30, 2008Date of Patent: August 17, 2010Assignee: Kanata Chemical Technologies Inc.Inventors: Kamaluddin Abdur-Rashid, Rongwei Guo, Xuanhua Chen, Wenli Jia
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Patent number: 7772445Abstract: The present disclosure relates to a process for the hydrogenation of compounds comprising one or more carbon-oxygen (C?O) double bonds, to provide the corresponding alcohol, comprising contacting the compound with hydrogen gas at and a catalyst comprising a ruthenium-aryl-aminophosphine complex.Type: GrantFiled: July 7, 2008Date of Patent: August 10, 2010Assignee: Kanata Chemical Technologies Inc.Inventors: Xuanhua Chen, Wenli Jia, Kamaluddin Abdur-Rashid, Rongwei Guo