- Controlled cyclopolymerization of difunctional vinyl monomers in coordination nanochannels
-
Radical cyclopolymerization of difunctional monomers based on 1,6-diene components was performed in one-dimensional channels of porous coordination polymers (PCPs). Although bulk or solution polymerization of the monomers usually gives cross-linked insolu
- Uemura, Takashi,Nakanishi, Ryo,Kaseda, Tetsuya,Uchida, Noriyuki,Kitagawa, Susumu
-
-
Read Online
- Bimetallic samarium(III) catalysts via electron transfer initiation: The facile synthesis of well-defined (meth)acrylate triblock copolymers
-
A method for generating a bifunctional organolanthanide(III) initiator in situ from a (meth)acrylate monomer and a divalent samarium precursor. (C5Me5)2Sm (1) or (C5Me5)2Sm(THF)2 (2), is described. This process involves one-electron transfer from the Sm(II) species to monomer, forming radical anions which couple to give a bimetallic samarium(III) enolate that acts as a bisinitiator for living polymerization. Well-defined, highly syndiotactic ABA triblock copolymers containing both methacrylate and acrylate segments were prepared in two monomer addition steps with this methodology. Selective side chain deprotection may be carried out on copolymers containing poly(tert-butyl acrylate) or poly(benzyl methacrylate) blocks to give syndiotactic ester-acid copolymers.
- Boffa, Lisa S.,Novak, Bruce M.
-
p. 15367 - 15396
(2007/10/03)
-
- Isolation and purification of oxadimethacrylics
-
A process for isolating and purifying oxadimethacrylics of the general formula I where A and B are selected from the group consisting of --COOR1, --COR1, --CONR2 R3 and --CN and R1, R2 and R3 are each defined as follows: R1 is hydrogen, alkyl, substituted or unsubstituted cycloalkyl or cycloalkylalkyl, hydroxyalkyl, aminoalkyl, N-alkylaminoalkyl, N,N-dialkylaminoalkyl, substituted or unsubstituted aryl or arylalkyl, R2 and R3 are each hydrogen, alkyl, substituted or substituted cycloalkyl or cycloalkylalkyl, substituted or unsubstituted aryl or arylalkyl, comprises precipitating or crystallizing them from their solutions that contain at least one liquid hydrocarbon compound.
- -
-
-
- A FACILE, EFFICIENT ROUTE TO METHYL α-HYDROXYMETHYLACRYLATE AND METHYL α-HALOMETHYLACRYLATES
-
DABCO-catalyzed coupling of formaldehyde and methyl acrylate provides the title hydroxy compound.Treatment with HBr conveniently affords the key synthetic intermediate methyl α-bromomethylacrylate in good overall yield.
- Drewes, Siegfried E.,Loizou, Georgia,Roos, Gregory H. P.
-
p. 291 - 298
(2007/10/02)
-