Recyclable and selective Lewis acid catalysts for transesterification and direct esterification in a fluorous biphase system: tin(IV) and hafnium(IV) bis(perfluorooctanesulfonyl)amide complexes
摘要:
Tin(IV) and hafnium(IV) bis(perfluorooctanesulfonyl)amide complexes were shown to give excellent yield and selectivity for highly practical transesterification and direct esterification, respectively, with an equimolar ratio of the reactants in a fluorous biphase system. It was found that these metal complexes were completely recovered and reused in the immobilized fluorous phase without loss of their catalytic activities. (C) 2003 Elsevier Ltd. All rights reserved.
PHOTOACID GENERATOR, AND RESIN COMPOSITION FOR PHOTOLITHOGRAPHY
申请人:SAN-APRO LTD.
公开号:US20160368879A1
公开(公告)日:2016-12-22
Provided is a non-ionic photoacid generator (A) expressed by general formula (1). R1 and R2 each independently represents an alkyl group having 1-18 carbons or a fluoroalkyl group having 1-18 carbons, an alkenyl group having 2-18 carbons, an alkynyl group having 2-18 carbons, an aryl group having 6-18 carbons, a silyl group, or the like; m and n respectively represent the number of R1s and R2s, each number being an integer from 0 to 3, and the total number (m+n) of R1s and R2s being an integer from 1 to 6. The m number of R1s and the n number of R2s may each be the same or different. R3 represents a hydrocarbon having 1-18 carbons wherein one part or all of the hydrogen may be substituted by fluorine.
[EN] GEL FORMULATIONS FOR ENHANCING THE EFFECT OF RADIOTHERAPY<br/>[FR] FORMULATIONS DE GEL POUR AMÉLIORER L'EFFET DE RADIOTHÉRAPIE
申请人:UNIV DENMARK TECH DTU
公开号:WO2016079331A1
公开(公告)日:2016-05-26
The present invention relates to a composition comprising: a. non-water soluble carbohydrates b. a contrast agent for imaging, wherein at least 60% of the contrast agent remains within 10 cm from the injection site after 24h, for use in local co-administration into a human or animal body, and wherein the composition is a liquid before administration into the human or animal body and increases in viscosity by more than 1,000 centipoise (cP) after administration.
本发明涉及一种包含以下成分的组成物:a. 非水溶性碳水化合物 b. 成像的对比剂,其中至少60%的对比剂在24小时后保持在注射部位10厘米范围内,用于在人体或动物体内局部共同给药,并且该组成物在给药前为液态,在给药后在粘度上增加超过1,000厘泊(cP)。
Polyfluoro-compounds based on the cycloheptane ring system. Part 1. Compounds derived from tridecafluorocycloheptane
作者:John A. Oliver、Robert Stephens、John Colin Tatlow
DOI:10.1016/s0022-1139(00)81486-4
日期:1983.1
cycloheptane: the former was demethylated by sulphuric acid to dodecafluorocycloheptanone. The dichloro-adduct of the perfluoro-olefin was reduced by lithium aluminium hydride to a complex mixture, from which 1H/2H- and 1H,2H/-dodecafluorocycloheptane were isolated.
fluorine acceptor which defluorinates perfluoroalkanes with the partial structure (Rf)2CFCF(Rf)2 to alkenes and perfluoroalkenes to dienes. Carbon catalyzes double-bond shifts, as well as cis/trans and ring-chain perfluoro-olefin isomerizations. Carbon effectively catalyzes TFE and HFP dimerizations. Less effectively, carbon catalyzes further oligomerization of TFE to give low yields of linear, internal olefins
Described herein is fluorinated dye comprising: a fluorescing coumarin-derived moiety connected to an oligomer of hexafluoropropylene oxide via a non-fluorinated divalent linking group. Such fluorinated dyes are soluble in fluorinated fluids and may be used to detect leaks in various systems such as refrigerant, air conditioning and/or heat transfer systems.