摘要:
A method for preparing 2-(N-substituted)-amino-benzimidazole derivatives is provided, which comprises the following steps: (1) reacting a compound of 2-(N-protecting group)-O-aryl diamine with a compound of N-phenoxycarbonyl monosubstituted amine to obtain a compound of 2-(N-protecting group)-amino aryl urea; (2) in a suitable organic solvent, performing dehydrating cyclization reaction of the compound of 2-(N-protecting group)-amino aryl urea in the presence of an organic base and dichloro triphenylphosphine prepared by triphenylphosphine oxide with oxalyl chloride or diphosgene or triphosgene, or dibromo triphenylphosphine prepared by triphenylphosphine oxide with bromine, to produce a compound of 1-protecting group-2-(N-substituted)-amino-benzimidazole; (3) deprotecting the resulting compound of 1-protecting group-2-(N-substituted)-amino-benzimidazole to obtain the compound 2-(N-substituted)-amino-benzimidazole.
摘要:
Disclosed is a preparation method of high-optical purity N2-[1-(S)-ethoxycarbonyl-3-phenylpropyl]-N6-trifluoroacetyl-L-lysine. The method includes: adding crude N2-[1-(S)-ethoxycarbonyl-3-phenylpropyl]-N6-trifluoroacetyl-L-lysine to one or more organic solvents, and then reacting with an organic acid to form a salt, which is precipitated, thereby achieving the purpose of separation and purification; next, adding the obtained solid or mother concentrate into deionized water, and then adding an inorganic base or an organic base for basification, so as to adjust the pH value, removing the organic acid, filtering, washing and drying, to obtain the high-optical purity N2-[1-(S)-ethoxycarbonyl-3-phenylpropyl]-N6-trifluoroacetyl-L-lysine, where the molar ratio of 1S-isomer to 1R-isomer is equal to or greater than 99:1.
摘要:
Disclosed is a preparation method of high-optical purity N2-[1-(S)-ethoxycarbonyl-3-phenylpropyl]-N6-trifluoroacetyl-L-lysine. The method includes: adding crude N2-[1-(S)-ethoxycarbonyl-3-phenylpropyl]-N6-trifluoroacetyl-L-lysine to one or more organic solvents, and then reacting with an organic acid to form a salt, which is precipitated, thereby achieving the purpose of separation and purification; next, adding the obtained solid or mother concentrate into deionized water, and then adding an inorganic base or an organic base for basification, so as to adjust the pH value, removing the organic acid, filtering, washing and drying, to obtain the high-optical purity N2-[1-(S)-ethoxycarbonyl-3-phenylpropyl]-N6-trifluoroacetyl-L-lysine, where the molar ratio of 1S-isomer to 1R-isomer is equal to or greater than 99:1.
摘要:
A method for preparing 2-(N-substituted)-amino-benzimidazole derivatives is provided, which comprises the following steps: (1) reacting a compound of 2-(N-protecting group)-O-aryl diamine with a compound of N-phenoxycarbonyl monosubstituted amine to obtain a compound of 2-(N-protecting group)-amino aryl urea; (2) in a suitable organic solvent, performing dehydrating cyclization reaction of the compound of 2-(N-protecting group)-amino aryl urea in the presence of an organic base and dichloro triphenylphosphine prepared by triphenylphosphine oxide with oxalyl chloride or diphosgene or triphosgene, or dibromo triphenylphosphine prepared by triphenylphosphine oxide with bromine, to produce a compound of 1-protecting group-2-(N-substituted)-amino-benzimidazole; (3) deprotecting the resulting compound of 1-protecting group-2-(N-substituted)-amino-benzimidazole to obtain the compound 2-(N-substituted)-amino-benzimidazole.
摘要:
Disclosed are new dicycloazaalkane derivates represented by general formula (I), preparation processes and pharmaceutical compositions containing them, and the uses for treatment especially for dipeptidyl peptidase inhibitor (DPP-IV), in which each substitute group of general formula (I) is as defined in specification.
摘要:
The present invention relates to new dicyclooctane derivates represented by general formula (I), preparation processes and pharmaceutical compositions containing them, and to uses for treatment especially for dipeptidyl peptidase inhibitor (DPPIV), in which each substituent group of general formula (I) is as defined in specification.
摘要:
A high-energy-density, high-cycling-life Si-based anode is used for rechargeable Lithium-ion batteries with either solid-state electrolyte or currently commercialized liquid electrolyte. The Si-based anodes include a silicon-based active material, conductive agent(s), and polymer(s) that act as binder(s). The silicon-based active material includes silicon, graphite, metallic or non-metallic oxide, and/or a polymer. The electrode has a specific capacity of at least 2328 mAh/g when cycled at a charge-discharge rate of about 0.5 C and 3245 mAh/g at 0.05 C. Sheets of the Si-based electrode are processable with a well-established industrial process that is cost-effective, scalable, and compatible with currently used Li-ion production lines. A lithium electrochemical pouch cell is manufactured with the Si-based anode sheet with either a liquid electrolyte or a solid-state electrolyte to offer high energy density, long cycle life, and high charge/discharge rates.
摘要:
Objects of the present invention include creating cathode materials that have high energy density and are cost-effective, environmentally benign, and are able to be charged and discharged at high rates for a large number of cycles over a period of years. One embodiment is a battery material comprised of a doped nanocomposite. The doped nanocomposite may be comprised of Li—Co—PO4; C; and at least one X, where said X is a metal for substituting or doping into LiCoPO4. In certain embodiments, the doped nanocomposite may be LiCoMnPO4/C. Another embodiment of the present invention is a method of creating a battery material comprising the steps of high energy ball milling particles to create complex particles, and sintering said complex particles to create a nanocomposite. The high energy ball milling may dope and composite the particles to create the complex particles.
摘要:
Objects of the present invention include creating cathode materials that have high energy density and are cost-effective, environmentally benign, and are able to be charged and discharged at high rates for a large number of cycles over a period of years. One embodiment is a battery material comprised of a doped nanocomposite. The doped nanocomposite may be comprised of Li—Co—PO4; C; and at least one X, where said X is a metal for substituting or doping into LiCoPO4. In certain embodiments, the doped nanocomposite may be LiCoMnPO4/C. Another embodiment of the present invention is a method of creating a battery material comprising the steps of high energy ball milling particles to create complex particles, and sintering said complex particles to create a nanocomposite. The high energy ball milling may dope and composite the particles to create the complex particles.