[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.
One-pot esters synthesis from secondary alcohols and CO catalyzed byPd-phosphine systems
作者:Nadezhda T. Sevostyanova、Sergey A. Batashev、Anastasiya S. Rodionova、Dar'ya K. Kozlenko
DOI:10.1016/j.tet.2023.133653
日期:2023.10
The aim of the work is to develop the esters syntheses by combining in one reactor the acid–catalytic intramolecular alcohols dehydration and the resulting alkenes alkoxycarbonylation. Esters were synthesized from cycloalkanols or secondary alkanols C5–C9 and CO under mild conditions. For the first time, a wide range of catalytic systems including palladium precursor, organophosphine, strong protonic
这项工作的目的是通过在一个反应器中结合酸催化分子内醇脱水和由此产生的烯烃烷氧基羰基化来开发酯合成。在温和条件下,由环烷醇或仲烷醇C 5 –C 9与CO合成酯。首次在基于环己醇和 CO 的模型一锅法工艺中测试了多种催化体系,包括钯前体、有机膦、强质子酸和结合水添加剂。直链仲醇 C 6、C 7和 C 9与 XANTPHOS 促进剂一起在 Pd 系统催化的异构化烷氧基羰基化反应器中组合。这些过程导致异构酯的形成,其中 60-73% 是直链羧酸酯,是末端 CO 加成到烯烃上的产物。
A method for improving the release of a cast concrete item from the mould by applying to the mould a mould release composition
申请人:CASTROL A/S
公开号:EP0328158A1
公开(公告)日:1989-08-16
The release of a moulded concrete body from the mould can be improved by applying to the mould an effective amount of a concrete release composition comprising one or more oily esters of aliphatic carboxylic acids with mono- or dihydric alcohols, with a melting point of at the most 35°C, the total number of carbon atoms in the esters being 8-46, in an amount of 26-100% by weight, calculated on the total composition, optionally in admixture with other additives such as mineral oils, vegetable oils, glycols, glycol ethers, alkanols, emulsifiers and/or water.
A microcapsulated pigment contains, as reaction media one or more specific aliphatic acid alcohol esters obtained from monohydric aliphatic alcohols having odd numbers of carbon atoms and aliphatic carboxylic acids, these reaction media in a homogenious compatible state with chromatic components are occluded in microcapsules to obtain characteristics of thermochromism with a hysteresis range (segment HG) from 8°C to 30°C.
Disclosed is a thermochromic microencapsulated pigment which comprises as four essential components (a) an electron-donating chromatic organic compound, (b) an electron-accepting compound, (c) a reaction medium determining the temperatures at which the color reactions of component (a) with component (b) take place, and (d) a color change temperature regulator, the color change temperature regulator (d) comprising one or more compounds selected from the group consisting of esters, alcohols, ketones, acid amides, hydrocarbons, and fatty acids and having a melting point Y (°C) satisfying the relationship (X+30)°C≤Y≤200°C, wherein X (°C) is the melting point of component (c), and the four essential components being microencapsulated.