- A Facile Stereoselcetive Synthesis of (E)-1-Aryl-1,2,3,3,3-pentafluoropropenes and (E)-1-Aryl-2-chloro-1,3,3,3-tetrafluoropropenes
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Arenecarbaldehydes ArCHO were allowed to react with a carbenoid reagent CF3CX2Mtl (X=Cl, Mtl=ZnCl, X=F, Mtl=LI) to give the adducts ArCH(OH)CX2CF3 whose hydroxyl group was substituted by fluorine.Dehydrohalogenating of the resultant ArCHFCX2CF3 (X=Cl or F
- Kuroboshi, Manabu,Hiyama, Tamejiro
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p. 1607 - 1610
(2007/10/02)
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- An Improved Synthesis of 1-Phenylpentafluoropropenes
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1-Phenylpentafluoropropene and a number of its para- and ortho-substituted derivatives were prepared in high yields by reaction of hexafluoropropene with etheral solutions of corresponding phenylmagnesium bromides in sealed glass tubes under autogenous pressure.The products were obtained as mixtures of the Z and E isomers, which ratios varied from 1/2 to 1/6 in favour of the E forms. 19F n.m.r. and i.r. spectra and b.p. of the 1-phenylpentafluoropropenes are reported.
- Dmowski, Wojciech
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- Electrophilic Bromination of Fluoro Olefins: Syn vs. Anti Addition
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The ionic addition of bromine in glacial acetic acid to 4-RC6H4CF=CFX (R = CO2H, Br, H, CH3, OCH3; X = Cl, CF3) and 4-RC6H4CH=CFCl (R = Br, CH3) has been studied.For all olefins the 1,2-dibromo adduct is the predominant product, with a minor amount of the
- Naae, Douglas G.
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p. 1394 - 1401
(2007/10/02)
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