F-烷基化试剂的反应,包括(全氟烷基)烷基卤化物和磺酸盐[R fn(CH 2)m X(X = Br,I,OTs,OTf)],以及在100°C DMSO中略有过量的NaN 3保持5小时,然后进行水蒸气蒸馏,以高纯度(GC测定≥98%)高至极好产率分离出叠氮化物R fn(CH 2)m N 3。由于这些氟叠氮化物的稳定性,它们可以在大气压或更低的压力下蒸馏以进一步纯化。4-叠氮全氟甲苯(p- CF 3 C 6 F 4 N 3)和1-叠氮辛烷也分别在相似的条件下从全氟甲苯(CF 3 C 6 F 5)或1-碘辛烷开始制备。蒸汽蒸馏可以轻松安全地分离出高达50 g的产品。
Highly selective synthesis of [(perfluoroalkyl) methyl] oxiranes (by the addition of iodoperfluoroalkanes to allyl acetate)
摘要:
Mixtures of regioisomeric adducts of monoiodoperfluoroalkanes R-F-I (R-F = C4F9, C6F13 C8F17) with allyl acetate, RFCH2CHICH2OAc (1a-1c) and rearranged adducts RFCH2CH(OAc)-CH2I (2a-2c), were converted chemoselectively to the corresponding oxiranes RFCH2CH(-O-)CH2 (3a-3c) in yields of 94-96% (total yields of the two-step synthesis starting from R-F-I were 85-87%). The chemoselectivity of the oxirane formation appeared to be very dependent on the solvent used. Dependence on the reaction conditions on formation of byproducts RFCH=CHCH2OAc (4a-4c) and RFCH=CHCH2OH (5a-5c) in the epoxidation reaction was studied. (C) 1997 Elsevier Science S.A.
POLYCARBONATE-BASE POLYMER, PRODUCTION PROCESS, RESIN COATING FLUID PREPARED THEREFROM, AND ELECTROPHOTOGRAPHIC PHOTORECEPTOR PREPARED THEREFROM
申请人:IDEMITSU KOSAN COMPANY LIMITED
公开号:EP0837085A1
公开(公告)日:1998-04-22
A polymer comprising mainly repeating units (1) and/or repeating units (2), containing optionally terminal groups (3) and/or repeating units (4), and having a reduced viscosity [ηsp/c] of 0.2 to 10.0 dl/g as measured in a 0.5 g/dl solution thereof in methylene chloride at 20°C; a resin coating fluid containing the polymer, a charge-transfer substance and a solvent; and an electrophotographic photoreceptor containing the polymer as a binder resin in a photosensitive layer, wherein Rf1 represents a group that is composed of at least carbon atoms and fluorine atoms and bonded directly to the two oxygen atoms of the carbonate linkage in the general formula (1) without any intervening arylene group; and Rf2 represents a group that is composed of at least carbon atoms and fluorine atoms and bonded directly to one of the oxygen atoms of the carbonate linkage in the general formula (3) without any intervening arylene group.
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.