A convenient preparation of vicinal perfluoroalkyl enol ethers, by the action of alcohols on 1-bromo-1-perfluoroalkylethylenes to the presence of potassium hydroxide, is described. Some aspects of their reactivity are reported. (C) 2004 Elsevier B.V. All rights reserved.
Novel aerosol formulation containing a polar fluorinated molecule
申请人:——
公开号:US20030194378A1
公开(公告)日:2003-10-16
The present invention relates to a stable pharmaceutical aerosol formulation intended for inhalation. The formulation contains an active substance, an aerosol propellant, a polar flurorinated molecule and an excipient. The preferred propellant is HFA 134a or HFA 227 or a mixture thereof.
Aldehydes RFCH2CHO (R(F) is a linear perfluoroalkyl chain) have been obtained in the addition reaction of R(F)I to vinyl acetate in the presence of zinc. RFCH2CHIOAc is formed as an intermediate in the course of the reaction. Under appropriate conditions, RFCH2CHO and its acylal or acetal derivatives are obtained in good yields.
NOVEL AEROSOL FORMULATION CONTAINING A POLAR FLUORINATED MOLECULE
申请人:AstraZeneca AB
公开号:EP1303258A1
公开(公告)日:2003-04-23
[EN] NOVEL AEROSOL FORMULATION CONTAINING A POLAR FLUORINATED MOLECULE<br/>[FR] NOUVELLE PREPARATION EN AEROSOL CONTENANT UNE MOLECULE FLUOREE POLAIRE
申请人:ASTRAZENECA AB
公开号:WO2002003958A1
公开(公告)日:2002-01-17
The present invention relates to a stable pharmaceutical aerosol formulation intended for inhalation. The formulation contains an active substance, an aerosol propellant, a polar flurorinated molecule and an excipient. The preferred propellant is HFA 134a or HFA 227 or a mixture thereof.
A convenient preparation of vicinal perfluoroalkyl enol ethers, by the action of alcohols on 1-bromo-1-perfluoroalkylethylenes to the presence of potassium hydroxide, is described. Some aspects of their reactivity are reported. (C) 2004 Elsevier B.V. All rights reserved.