[EN] LIPIDS AND LIPID COMPOSITIONS FOR THE DELIVERY OF ACTIVE AGENTS [FR] LIPIDES ET COMPOSITIONS LIPIDIQUES PERMETTANT L'ADMINISTRATION DE PRINCIPES ACTIFS
Abstract A remarkable template effect in the intramolecularradical cyclization process has been observed by the successful utilization of Lewis acid receptor, aluminum tris(2,6-diphenylphenoxide) (ATPH). The origin of this efficient template effect by ATPH would be ascribable to the well-defined reaction environment created in front of the aluminum coordination center; this enables appropriate proximity
[EN] LIPIDS AND LIPID COMPOSITIONS FOR THE DELIVERY OF ACTIVE AGENTS<br/>[FR] LIPIDES ET COMPOSITIONS LIPIDIQUES PERMETTANT L'ADMINISTRATION DE PRINCIPES ACTIFS
申请人:NOVARTIS AG
公开号:WO2016037053A1
公开(公告)日:2016-03-10
This invention provides for a compound of formula (I), or a pharmaceutically acceptable salt thereof, wherein RA, RB, R2 and R4 are defined herein. The compounds of formula (I) and pharmaceutically acceptable salts thereof are cationic lipids useful in the delivery of biologically active agents to cells and tissues.
7-Oxabicycloheptane ethers useful in the treatment of thrombolytic
申请人:E. R. Squibb & Sons, Inc.
公开号:US04513103A1
公开(公告)日:1985-04-23
7-Oxabicycloheptane ethers of prostaglandin analogs are provided having the structural formula ##STR1## and including all stereoisomers thereof. The compounds are cardiovascular agents useful, for example, in the treatment of thrombolytic disease.
Constrained H-Type 2 Blood Group Trisaccharide Synthesized in a Bioactive Conformation via Intramolecular Glycosylation
作者:Shirley A. Wacowich-Sgarbi、David R. Bundle
DOI:10.1021/jo990979a
日期:1999.12.1
The methyl glycoside of the II-type 2 trisaccharide 1 was synthesized in a constrained, bioactive conformation via intramolecular aglycon delivery. Computer modeling of the crystal structure of the Ulex europaeus I lectin with a docked H-type 2 trisaccharide suggested that the disaccharide Galp(1-->4)GlcpNAc1-->OCH3 could be tethered in a bioactive conformation if Gal O-6 and GlcNAc O-3 are linked via a three-carbon tether. The ethyl 1-thiogalactopyranoside 13 was used to alkylate the methyl 2-acetamido-2-deoxy glucopyranoside 7, and the resulting dimer was subjected to intramolecular glycosylation following protecting group manipulation. The tethered disaccharide 4 was glycosylated by the activated fucopyranosyl donor 3 to give the protected target molecule 17. Solid-phase binding assays showed that the tethered trisaccharide 2 was 3-fold less active than native II-type 2 trisaccharide 1 when assayed against the U, europaeus I lectin, whereas it was 250 times less active when assayed with the Psophocarpus tetragonolobus II lectin. The observed activities are consistent with published models for H-trisaccharide interactions with Ulex: and Psophocarpus lectins and provide further evidence that suggests reduction of oligosaccharide flexibility by intramolecular tethering provides no significant gain in binding energy.