POLYMER-CARBOHYDRATE CONJUGATES FOR DRUG DELIVERY TECHNOLOGY
申请人:Wu Nian
公开号:US20150157721A1
公开(公告)日:2015-06-11
The invention comprises compounds, methods of making, and methods of using. The compounds may have a linear or cylic backbone and three or four appended functional groups: one or two lipohilic compounds including sterols or “fat soluble” vitamins, one or two hydrophilic polymer, and one or two carbohydrate. A group of polymer-carbohydrate conjugates having a central backbone and three appended functional groups are disclosed wherein one lipophilic compound is void of both steroid acids. The conjugate may have fatty acids as the primary lipophilic carrier, one hydrophilic polymer, and one carbohydrate. Specific functional groups may be selected for specific applications in formulating pharmaceuticals, cosmetics, nutriceuticals, and the like. Typical coupling reaction of the conjugates may involve one or more or combinations or in series of alkylation including N-alkylation or O-alkylation, etherification, esterification and amidation chemical processes. A variety of linkers between the backbone and functional groups may also be selected to modify the carriers or center backbones for the coupling reactions and optimize performance of the conjugates.
Polymer-carbohydrate conjugates for drug delivery technology
申请人:Wu Nian
公开号:US10835608B2
公开(公告)日:2020-11-17
The invention comprises compounds, methods of making, and methods of using. The compounds may have a linear or cylic backbone and three or four appended functional groups: one or two lipohilic compounds including sterols or “fat soluble” vitamins, one or two hydrophilic polymer, and one or two carbohydrate. A group of polymer-carbohydrate conjugates having a central backbone and three appended functional groups are disclosed wherein one lipophilic compound is void of both steroid acids. The conjugate may have fatty acids as the primary lipophilic carrier, one hydrophilic polymer, and one carbohydrate. Specific functional groups may be selected for specific applications in formulating pharmaceuticals, cosmetics, nutriceuticals, and the like. Typical coupling reaction of the conjugates may involve one or more or combinations or in series of alkylation including N-alkylation or O-alkylation, etherification, esterification and amidation chemical processes. A variety of linkers between the backbone and functional groups may also be selected to modify the carriers or center backbones for the coupling reactions and optimize performance of the conjugates.
N-Iminopyridinium Compounds in Giese Reaction: Photoinduced Homolytic N–N and C–C Bond Cleavage for Cyanoalkyl Radical Generation
作者:Gyuri Han、Jihyun You、Junhyeon Choi、Eun Joo Kang
DOI:10.1021/acs.orglett.4c00565
日期:2024.3.29
photoinduced cyanoalkyl radical addition methodology using N-iminopyridinium reagents derived from cyclic ketones. Mechanistic investigations reveal the association of the excited Hantzsch ester and iminopyridinium with pyridyl radical generation. The ensuing cascade involving homolytic N–N bond and C–C bondcleavage of the pyridyl radical ultimately leads to the formation of cyanoalkyl radical species, leading
Synthesis of axially chiral biaryls via Pd(II)-catalyzed direct C(sp2)−H olefination
作者:Rohit Kumar、Diksha Parmar、Sarthi、Devesh Chandra、Sumit、Akhilesh K. Sharma、Upendra Sharma
DOI:10.1016/j.mcat.2024.114395
日期:2024.11
Herein, a protocol for the construction of axially chiral biaryls Pd-catalyzed direct C–Holefination of 1-arylisoquinoline -oxides through kinetic resolution have been uncovered. The atroposelective C–Holefination of 1arylisoquinoline -oxides is achieved with alkenes such as acrylates, styrenes, phenylvinyl sulfone, acrylonitrile, and maleimides. The commercially available, cost-effective, and bench-stable