摘要:

AbstractTelomerizations of chlorofluorinated telogens CF3CCl3and\documentclass{article}\pagestyle{empty}\begin{document}$${\rm Cl\rlap{--} (CFCl \hbox{---} CF}_{\rm 2} {\rm \rlap{--} )}_{\rm n} {\rm CCl}_{\rm 3}$$\end{document}(1 ≤ n ≤ 4) with acrylic, allylic, and vinylic monomers were studied. With allyl alcohol and 2‐hydroxyethyl acrylate the corresponding fluorinated adducts1and2were obtained directly. Vinyl and allyl acetates led to the adducts4a,band5a,b, respectively, which could be transformed into the corresponding acetals and alcohols. Telomerizations of methyl acrylate and methacrylate led to the fluorinated adducts12aandbin the presence of copper chloride as catalyst or also with iron trichloride in the case of methyl methacrylate. By intramolecular elimination the methacrylate adducts were transformed into the lactons13and14and the acrylate adducts by reduction into the alcohols1and2. The same reduction of the methacrylate adduct led to the 2,4,4‐trichloro‐5,5,5‐trifluoro‐2‐methyl‐1‐pentanol (15). Independent on the applied catalyst the telomerization of vinylacetic acid led to the monoaddition product, whereas in the case of methacrylic or acrylic acid the formation of monoadducts or higher addition products was found to dep

ISSN:0025-116X    

DOI:10.1002/macp.1981.021821101

出版商:Hüthig&Wepf Verlag    

年代:1981

数据来源: WILEY

摘要:

AbstractCopolymers ofN‐(2‐hydroxypropyl)methacrylamide containing oligopeptidic sequences either in side chains or as part of crosslinks were prepared. These polymers were applied intravenously to rats, and spectrophotometric analysis (oligopeptidic side chains) or gel permeation chromatography of urine (oligopeptidic crosslinks) have shown that both types of polymers are cleavable in v

ISSN:0025-116X    

DOI:10.1002/macp.1981.021821102

出版商:Hüthig&Wepf Verlag    

年代:1981

数据来源: WILEY

摘要:

AbstractThe rates of the binary copolymerizations ofN‐vinyl‐2‐pyrrolidone, styrene, and methyl methacrylate were investigated dilatometrically. In both systems withN‐vinyl‐2‐pyrrolidone as one of the two monomers the rate of copolymerization can be described by a theory of Abkin, whereas a theory of Russo and Munari can be applied to the behavior of the system styrene/methyl m

ISSN:0025-116X    

DOI:10.1002/macp.1981.021821103

出版商:Hüthig&Wepf Verlag    

年代:1981

数据来源: WILEY

摘要:

AbstractN‐Alkylation of low molcular N3O2‐ligands (2a,b) with several chloromethylated polystyrenes (1a–e) leads to covalently polymer bound Schiff's base ligands (3a–f), which react with Co2+to polymer bound N3O2chelates (10a–f). A second route to3cstarts from1band the N3‐ligand5over the polymer diamine7. The corresponding low molecular compounds were al

ISSN:0025-116X    

DOI:10.1002/macp.1981.021821104

出版商:Hüthig&Wepf Verlag    

年代:1981

数据来源: WILEY

摘要:

AbstractThe uncatalysed reaction between phenol and paraformaldehyde in aprotic nonpolar media at 170–220°C provides an efficient inexpensive route to novolac resins with almost all of the methylene‐linkages inortho‐ortho′ sequence. The role played by the solvent is shown to be determinant in theortho‐specific insertion of methylene‐bridges between the ph

ISSN:0025-116X    

DOI:10.1002/macp.1981.021821105

出版商:Hüthig&Wepf Verlag    

年代:1981

数据来源: WILEY

摘要:

AbstractN‐Trifluoroacetyl‐Polyamid 66 (1) is used for the trifluoroacetylation of amino acid‐ and dipeptide esters. Advantages and limitations of the polymeric reagent compared with low molecular trifluoroacetylating reagents are discussed. A mixture of amino acid methyl esters can be converted by1to theN‐trifluoroacetyl derivatives, which are separated and identified by gas chromat

ISSN:0025-116X    

DOI:10.1002/macp.1981.021821106

出版商:Hüthig&Wepf Verlag    

年代:1981

数据来源: WILEY

摘要:

AbstractThe course of Ritter's reaction of atactic poly(acrylonitrile) withN‐hydroxymethylamides of acetic, benzoic and benzenesulfonic acids and withN‐hydroxymethylimides of succinic, phthalic ando‐sulfobenzoic acids were examined in tetramethylene sulfone under conditions where benzyl alcohol, isopropyl alcohol and triphenylmethanol appear as nonreactive. The reaction systems have a stronger tendency towards crosslinking than that exhibited under comparable conditions by solutions of poly(N‐benzamidomethylacrylamide), poly(N‐phthalimidomethylacrylamide) and poly(N‐o‐sulfobenzamidomethylacrylamide) prepared as reference standards by the solution polymerization of theN‐substituted acrylamides in methanol with dibenzoyl peroxi

ISSN:0025-116X    

DOI:10.1002/macp.1981.021821107

出版商:Hüthig&Wepf Verlag    

年代:1981

数据来源: WILEY

摘要:

AbstractPolymeric Schiff‐bases (3a–gand5a–c) were synthesized by condensation polymerization of 4,4′‐methylenedibenzaldehyde (1) with diamines2a–gor diisocyanates4a–c. In addition, a polymeric hydrazone was synthesized by reaction of the dioxime of1with the isocyanate4aand a crosslinked product was prepared from a trifunctional isocyanate and1. The products were characterized by elemental analysis and IR spectroscopy. Their physico‐chemical properties were determined and discussed as function of the number of CH2‐groups in th

ISSN:0025-116X    

DOI:10.1002/macp.1981.021821108

出版商:Hüthig&Wepf Verlag    

年代:1981

数据来源: WILEY

摘要:

AbstractPoly(N‐vinylcarbazole)s, [poly(l‐(N‐carbazolyl)ethylene)s], (PVCz's) were prepared under various polymerization conditions. The stereoregularities were estimated by means of13C NMR spectroscopy. Although the stereoregularity of the polymers obtained by BF3O(C2H5)2was hardly changed by the polymerization temperature, it changed with the solvent polarity from an isotactic‐rich configuration in toluene and CH2Cl2to a syndiotactic‐rich configuration in nitrobenzene. The13C NMR spectra of the polymers obtained by organic electron acceptors, support the conclusion that the polymerization by tetracyanoethylene,p‐bromanil, 2,3‐dichloro‐5,6‐dicyano‐p‐benzoquinone, and tetrachlorophthalic anhydride proceed by a cationic mechanism. In the polymerization ofN‐vinylcarbazole (VCz) with maleic anhydride as an electron acceptor, a small amount of copolymer was obtained together with the homopolymer of VCz. Although the structure of the homopolymers is the same as that of the radically obtained polymer, it is considered that the polymer is formed by a cationic mechanism. The polymerizations of VCz by inorganic compounds, such as ferric nitrate, cupric nitrate, cupric bromide, etc., as

ISSN:0025-116X    

DOI:10.1002/macp.1981.021821109

出版商:Hüthig&Wepf Verlag    

年代:1981

数据来源: WILEY

摘要:

AbstractVinyl group containing derivatives of 18‐crown‐6 were synthesized and copolymerized with styrene andp‐divinylbenzene ofp‐divinylbiphenyl. The selectivity of the alkali metal cation complexation of one of the polymers was investigated. The prepared polymers were applied as catalysts in several nucleophilic substitution reactions. The influence of the crosslinking agent as well as the degree of crosslinking on the catalytic activity of the polymers was

ISSN:0025-116X    

DOI:10.1002/macp.1981.021821110

出版商:Hüthig&Wepf Verlag    

年代:1981

数据来源: WILEY